WO2021232244A1 - Air purification, sterilization and virus inactivation device - Google Patents

Air purification, sterilization and virus inactivation device Download PDF

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Publication number
WO2021232244A1
WO2021232244A1 PCT/CN2020/091080 CN2020091080W WO2021232244A1 WO 2021232244 A1 WO2021232244 A1 WO 2021232244A1 CN 2020091080 W CN2020091080 W CN 2020091080W WO 2021232244 A1 WO2021232244 A1 WO 2021232244A1
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WO
WIPO (PCT)
Prior art keywords
light source
graphene
photocatalytic degradation
sterilization
photocatalytic
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PCT/CN2020/091080
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French (fr)
Chinese (zh)
Inventor
林楷睿
许志
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福建新峰二维材料科技有限公司
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Priority to PCT/CN2020/091080 priority Critical patent/WO2021232244A1/en
Publication of WO2021232244A1 publication Critical patent/WO2021232244A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultra-violet radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the invention relates to the technical field of air purification, sterilization and disinfection, in particular to an air purification, sterilization and virus killing device.
  • TiO 2 can only absorb ultraviolet light with a wavelength less than 387 nm, and its photocatalytic efficiency is very low under sunlight. After the prepared three-dimensional graphene material is composited with TiO 2 through a hydrothermal method, the photogenerated carriers generated by the TiO 2 under illumination can be quickly transferred.
  • Nano-TiO 2 has special physical and chemical properties that traditional materials do not have. It has high chemical stability, non-toxic and non-polluting, small particle size, large specific surface area, high surface energy, etc., and its three unique effects: surface Effect, small size effect and macroscopic quantum tunneling effect.
  • Three-dimensional graphene material is different from two-dimensional graphene in structure.
  • Two-dimensional graphene is easy to agglomerate and difficult to disperse, and it is difficult to obtain a material with a high specific surface area. It has a three-dimensional hollow porous network structure with graphene walls.
  • Laminated graphite and porous graphitic carbon foams have the advantages of ultra-low density surface area, high thermal conductivity, high temperature resistance, corrosion resistance, ductility, and flexibility.
  • the single layer is transparent and has high quality.
  • activated carbon adsorption formaldehyde or HEPA technology to filter. Collect suspended bacteria to improve air quality; use packaging technology and refrigeration methods to extend the shelf life of food.
  • activated carbon Because the structure of activated carbon is characterized by many pores and strong adsorption, many disinfection masks are made using this feature of activated carbon. It is best to choose activated carbon with relatively small particles. The smaller the particles, the better the adsorption effect.
  • activated carbon can only adsorb formaldehyde and cannot be decomposed. Formaldehyde still exists in the air and cannot be completely disappeared. The activated carbon is easily saturated and can be used for a short period of time.
  • the present invention provides an air purification, sterilization and virus killing device that uses high photocatalytic efficiency materials to achieve fresh preservation and storage of food at room temperature and removal of indoor harmful formaldehyde, various bacteria and viruses.
  • an air purification and sterilization virus killing device including a blower device, a deep ultraviolet light source, a photocatalytic light source, a graphene photocatalytic degradation device, a power connection device, and
  • the housing, the blowing device, the deep ultraviolet light source, the photocatalytic light source, and the graphene photocatalytic degradation device are all electrically connected to the power connection device, the blowing device, the deep ultraviolet light source, the photocatalytic light source, and the graphene
  • the photocatalytic degradation device and the power connection device are all fixedly connected to the housing, the deep ultraviolet light source and the photocatalytic light source are arranged together between the air blowing device and the graphene photocatalytic degradation device, and the photocatalytic light source is irradiated on the graphene photocatalytic degradation device
  • the shell is provided with a through hole.
  • the blowing device is a low-voltage electric fan, which functions to promote air circulation.
  • the deep ultraviolet light source is a 220nm single-wavelength lamp tube or LED light source that does not generate ozone.
  • the photocatalytic light source is an ultraviolet light tube or LED light source with a wavelength of 380-390 nm.
  • the material of the shell is an opaque material.
  • the graphene photocatalytic degradation device includes a base layer of nickel mesh or copper mesh, a single-layer three-dimensional graphene layer, a TiO 2 nanosphere film layer, and a nano silver layer on the surface of the TiO 2 nanosphere film layer.
  • the pore size of the base layer is 0.01-0.6mm, preferably 0.01-0.1mm, and the diameter of the TiO2 nanospheres in the outer layer is 5-100nm.
  • a direct current is passed through the graphene photocatalytic degradation device, and the current is 0.5A-1A.
  • a preparation method of the graphene photocatalytic degradation device of the air purification, sterilization and virus killing device includes the following steps:
  • the removal time in step 1 is 5-20 minutes
  • the carbon source gas is selected from one or more of methane, methanol, ethanol or ethane; the protective gas is selected from Argon or Neon; when the carbon source gas is methane or ethane, the flow rate of the carbon source gas is 1-10 s.c.c.m., preferably 3-7 s.c.c.m.; when the carbon source gas is methanol or ethanol, use 1-10 s.c.c.m., preferably 3-7
  • the flow rate of the hydrogen is 100-300 s.c.c.m., preferably 150-250 s.c.c.m.
  • the flow rate of the protective gas is 300-600 s.c.c.m.
  • the cooling rate is 200-300°C/min.
  • the tetrabutyl titanate described in step 2 accounts for 15-25% of the ethanol mass; the nano-silver accounts for 0.01-1% of the ethanol mass; the ethanol temperature is controlled at 0-5°C, so The stated reaction time is 4-24h.
  • step 2 also includes adding silica nanoparticles, and the silica nanoparticles account for 0.01 to 3% of the ethanol by mass.
  • the drying temperature in step 3 is 50-80°C, the drying conditions are under vacuum, and the drying time is 3-4h; the heating temperature is preferably 400°C, The reaction time is 0.5-3 hours.
  • the air purification, sterilization and virus sterilization device provided by the present invention includes a graphene photocatalytic degradation device and a 220nm deep ultraviolet light, which are two functional modules that realize air purification, sterilization and sterilization.
  • the graphene photocatalytic degradation device is composed of graphene composite titanium dioxide and nano silver material. Titanium dioxide undergoes a photocatalytic reaction under ultraviolet light irradiation. Nano silver generates a large number of electrons under ultraviolet light irradiation, and a large number of electrons quickly enter the titanium dioxide. Speeds up the photocatalytic reaction and greatly increases the number of holes.
  • the high electron mobility of graphene can effectively extend the life of the carriers generated by photocatalysis, prevent the recombination of holes and electrons, and further greatly improve the high catalytic efficiency.
  • a large number of silver ions (Ag + , Ag 2+ , Ag 3+ ) will be formed after a large number of electrons on the surface of nano-silver run away.
  • the reduction potential of Ag 2+ and Ag 3+ is extremely high, which can generate atomic oxygen in the surrounding space.
  • Atomic oxygen has strong oxidizing properties and can destroy bacteria, while Ag + can adsorb the protease of the bacterial body and quickly bind with it, destroy the protease of the bacterial body, make it unable to breathe, and kill the bacteria.
  • the production of silver ions during the photocatalytic process of the graphene photocatalytic degradation device can effectively kill bacteria and viruses, and further improve the sterilization efficiency of the graphene photocatalytic degradation device.
  • the 220nm deep ultraviolet light can destroy the DNA or RNA molecular structure of the genetic material in bacteria and viruses, and make bacteria and viruses inactivated or unable to reproduce, thereby blocking the continuous replication and rapid spread of bacteria and viruses.
  • the titanium dioxide in the preparation of titanium dioxide nanospheres, by controlling the dropping rate and temperature, the titanium dioxide can form a spherical structure with uniform size and large specific surface area, which is uniformly distributed on the surface of a single-layer three-dimensional graphene together with nano-silver, with good dispersibility. , It not only avoids the agglomeration of its own particles, but also effectively prevents the re-stacking of graphene sheets.
  • the unique structure of nanocomposites makes it have good thermal stability and excellent photocatalytic activity. Fields such as materials and photocatalysis have potential applications.
  • the present invention has the following advantages:
  • the present invention further improves the photocatalytic efficiency, can efficiently degrade harmful organic matter such as formaldehyde, and effectively kill various harmful suspended bacteria and viruses in the air and harmful bacteria on the surface of food; thereby achieving efficient air purification and prolonging food preservation period the goal of.
  • the device of the present invention does not use any filter, does not have any adsorption phenomenon, and does not produce secondary pollution. It can efficiently oxidize and decompose harmful VOCs such as formaldehyde into harmless CO 2 and H 2 O, and kill efficiently without rebound. Viruses and bacteria eradicate air-suspended bacteria in confined spaces, realizing long-term high-efficiency air purification.
  • the device of the present invention can kill the bacteria on the surface of the object in the confined space, realizes the preservation of food at room temperature, is energy-saving and environmentally friendly, and is safe and practical.
  • the fresh-keeping instrument made by the graphene photocatalytic degradation device provided by the present invention can effectively sterilize, kill viruses, remove organic matter such as formaldehyde, ensure air quality, and can also sterilize and prolong food preservation period.
  • Figure 1 is a schematic diagram of the structure of an air purification, sterilization and virus killing device of the present invention
  • Fig. 2 is a schematic structural diagram of a graphene photocatalytic degradation device provided by the present invention.
  • Figure 3 is a graph showing the result of degradation of formaldehyde by the graphene photocatalytic degradation device provided by the present invention.
  • Fig. 4 is a graph showing the results of purification of H1N1 influenza A virus by the graphene photocatalytic degradation device provided by the present invention.
  • Figure 5 is a graph showing the results of purification of coliphage viruses by the graphene photocatalytic degradation device provided by the present invention.
  • Fig. 6 is a graph showing the result of purification of MS2 phage virus by the graphene photocatalytic degradation device provided by the present invention.
  • Fig. 7 is a graph showing the results of killing Staphylococcus epidermidis by the graphene photocatalytic degradation device provided by the present invention.
  • Fig. 8 is a graph showing the result of killing Pseudomonas fluorescens by the graphene photocatalytic degradation device provided by the present invention.
  • Fig. 9 is a graph showing the result of killing Staphylococcus albicans by the graphene photocatalytic degradation device provided by the present invention.
  • the air purification and sterilization device of the present invention consists of a blower device 1, a deep ultraviolet light source 2, a photocatalytic light source 3, a graphene photocatalytic degradation device 4, a power connection device 5 and a housing, the drum
  • the wind device 1, the deep ultraviolet light source 2, the photocatalytic light source 3, and the graphene photocatalytic degradation device 4 are all connected to the power connection device 5;
  • the graphene photocatalytic degradation device 4 and the power connection device 5 are all fixed to the housing;
  • the deep ultraviolet light source 2 and the photocatalytic light source 3 are arranged together in the middle of the air blowing device 1 and the graphene photocatalytic degradation device 4.
  • the light source 3 irradiates the graphene photocatalytic degradation device 4 with a plurality of through holes in the housing.
  • the graphene photocatalytic degradation device 4 can pass a direct current of 0.5A-1A;
  • the deep ultraviolet light source 2 is a 220nm single-wavelength lamp or LED light source, and the 220nm LED light source does not produce ozone;
  • the photocatalytic light source 3 has a wavelength of One of 380-390nm ultraviolet light tube or LED light source.
  • the blowing device is a low-voltage electric fan, which is used to promote air circulation.
  • the power connection device 5 supplies power to the blowing device 1, the deep ultraviolet light source 2, the photocatalytic light source 3, and the graphene photocatalytic degradation device 4.
  • the material of the shell is opaque material.
  • the graphene photocatalytic degradation device 4 includes a base layer of nickel mesh or copper mesh 4-1, a single-layer three-dimensional graphene layer 4-2, a TiO 2 nanosphere film layer 4-3, and a TiO 2 nanosphere film layer 4- 3 Nano silver layer 4-4 on the surface.
  • the pore size of the base layer 4-1 is 0.01-0.6 mm, and the pore size is preferably 0.01-0.1 mm.
  • a preparation method of the graphene photocatalytic degradation device of the air purification, sterilization and virus killing device includes the following steps:
  • a preparation method of a graphene photocatalytic degradation device is prepared by the following examples:
  • the temperature of ethanol is controlled at 0°C, and ultrasonically mix well. Continue to add 0.05g of nano-silver, and ultrasonically mix well. After that, the prepared single-layer three-dimensional graphene was put into the reaction solution, and placed in a hydrothermal reaction kettle at 160° C. for hydrothermal reaction for 4 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 50°C for 3 hours and then heat it to 500°C for 1 hour to obtain a base layer/three-dimensional graphene/ The TiO2 nanosphere/nano silver film is the photocatalytic degradation device 4.
  • the temperature of ethanol is controlled at 5°C, and the mixture is mixed uniformly by ultrasonic, continue to add 0.1g of nano silver, 0.1g
  • the prepared single-layer three-dimensional graphene is put into the reaction solution and placed in a hydrothermal reaction kettle at 220° C. for hydrothermal reaction for 24 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 80°C for 4 hours, and then heat it to 600°C for 0.5 hours to obtain a base layer/three-dimensional graphene/ TiO2 nanosphere/nano silver film, ie, graphene photocatalytic degradation device 4.
  • the temperature of the ethanol is controlled at 3°C, and ultrasonically mix uniformly. Continue to add 0.02g of nano-silver, and ultrasonically mix uniformly. Afterwards, the prepared single-layer three-dimensional graphene was put into the reaction solution, and placed in a hydrothermal reaction kettle at 180° C. for hydrothermal reaction for 16 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 60°C for 4 hours, and then heat it to 400°C for 3 hours to obtain a base layer/three-dimensional graphene/ TiO2 nanosphere/nano silver film, ie, graphene photocatalytic degradation device 4.
  • Detection process Place the 6W small air purification and preservation device provided by the present invention in a 4m3 confined space, the initial concentration of formaldehyde in the confined space is 1ppm, and then turn on the device to check the concentration of formaldehyde in the confined space every 5 minutes; as a comparison In the experiment, the initial concentration of formaldehyde in the confined space is also 1 ppm, and the device is not placed, and the concentration of formaldehyde in the confined space is detected every 30 minutes.
  • the formaldehyde degradation efficiency of the air-purified and fresh-keeping device provided by the present invention for 120 minutes in the closed space reaches about 90%, 160 minutes to about 97%; without the device, the formaldehyde in the closed space still retains 98% after 3 hours above.
  • the air purification device assembled by the technical scheme of the present invention is sent to a third-party testing agency to detect the purification efficiency of viruses in the air.
  • Figure 4 shows that the test results of the Guangzhou Institute of Microbiology show that the 60-minute purification rates of the three groups of H1N1 influenza A viruses are 98.88%, 97.82%, and 98.53%, respectively.
  • Figure 5 shows the test results of Guangzhou Industrial Microbiology Testing Center, showing that the average removal rate of coliphage virus in 1 hour is as high as 99.72%.
  • Figure 6 shows the RTI INTERNATIONAL test results show that the purification efficiency of MS2 phage virus is 12 times the natural decay rate.
  • the device provided by the present invention can effectively kill viruses in the air.
  • the air purification device assembled by the technical solution of the present invention is sent to a third-party testing agency to test the purification efficiency of bacteria.
  • Figures 7 and 8 show the RTI International test results respectively show that the purification efficiency of Staphylococcus epidermidis and Pseudomonas fluorescens are 72 times and 5 times of the natural attenuation rate respectively;
  • Figure 9 The test results of Guangdong Microbiological Analysis and Testing Center show that the killing rate of Staphylococcus albicans is as high as 98.77%. To sum up, it shows that the device provided by the present invention has high efficiency in killing bacteria, can well kill bacteria groups on the surface of food, prevent food from spoiling, and realize food preservation and extend the shelf life of food.
  • the principle of the present invention is: the nano-TiO2 photocatalytic degradation mechanism is divided into 8 steps to complete the photocatalytic process:
  • the silver ions produced by nano-silver under ultraviolet light destroy the protease of the bacterial body, making it unable to breathe and killing the bacteria.
  • the 220nm deep ultraviolet light destroys the DNA or RNA molecular structure of the genetic material in bacteria and viruses, and makes bacteria and viruses inactivated or unable to reproduce, thereby blocking the continuous replication and rapid spread of bacteria and viruses. Achieve efficient sterilization and elimination of viruses.
  • the invention further improves the photocatalytic efficiency, can efficiently degrade harmful organic matter such as formaldehyde, and effectively kill various harmful suspended bacteria and viruses in the air and harmful bacteria on the food surface; thereby achieving the purpose of efficiently purifying the air and extending the food preservation period .
  • the killing rate of H1N1 influenza A virus in 60 minutes is as high as 98.99% (the test result of Guangzhou Institute of Microbiology); the killing rate of coliphage virus is as high as 99.72% in one hour (the test result of Guangzhou Industrial Microbiology Testing Center); MS2 The purification efficiency of phage is 12 times of the natural decay rate (RTI INTERNATIONAL test results).
  • the purification efficiency of Staphylococcus epidermidis is 72 times of the natural decay rate (RTI INTERNATIONAL test results); the purification efficiency of Pseudomonas fluorescens is 5 times of the natural attenuation rate (RTIINTERNATIONAL test results); the killing rate of Staphylococcus albicans is as high as 98.77% (test results of Guangdong Microbial Analysis and Testing Center).
  • the device of the present invention does not use any filter screen, does not have any adsorption phenomenon, does not produce secondary pollution, can efficiently oxidize and decompose harmful VOCs such as formaldehyde into harmless CO 2 and H 2 O, and effectively kill viruses and viruses without rebound. Bacteria, eradicate air-suspended bacteria in confined spaces, and achieve long-term high-efficiency air purification.
  • the device of the present invention can kill the flora on the surface of the object in the confined space, realizes the preservation of food at room temperature, is energy-saving and environmentally friendly, and is safe and practical.
  • the fresh-keeping instrument made of the graphene photocatalytic degradation device provided by the present invention can effectively sterilize, kill viruses, remove organic matter such as formaldehyde, ensure air quality, and can also sterilize and prolong food preservation period.

Abstract

Disclosed is an air purification, sterilization and virus inactivation device, comprising a blower device (1), a deep ultraviolet light source (2), a photocatalysis light source (3), a graphene photocatalysis degradation device (4), a power source connection device (5) and a housing, wherein the blower device (1), the deep ultraviolet light source (2), the photocatalysis light source (3) and the graphene photocatalysis degradation device (4) are all electrically connected to the power source connection device (5); the blower device (1), the deep ultraviolet light source (2), the photocatalysis light source (3), the graphene photocatalysis degradation device (4) and the power source connection device (5) are all fixedly connected to the housing; the deep ultraviolet light source (2) and the photocatalysis light source (3) are arranged together between the blower device (1) and the graphene photocatalysis degradation device (4); the photocatalysis light source (3) irradiates the graphene photocatalysis degradation device (4); and the housing is provided with a through hole.

Description

一种空气净化和杀菌灭病毒装置Air purification, sterilization and virus killing device 技术领域Technical field
本发明涉及空气净化、杀菌消毒技术领域，尤其涉及一种空气净化和杀菌灭病毒装置。The invention relates to the technical field of air purification, sterilization and disinfection, in particular to an air purification, sterilization and virus killing device.
背景技术Background technique
TiO 2作为一种重要的半导体材料，且其只能吸收波长小于387nm的紫外光，在日光下光催化效率很低。将制得的三维石墨烯材料通过水热法与TiO 2复合后，可以快速转移TiO 2经光照产生的光生载流子。 As an important semiconductor material, TiO 2 can only absorb ultraviolet light with a wavelength less than 387 nm, and its photocatalytic efficiency is very low under sunlight. After the prepared three-dimensional graphene material is composited with TiO 2 through a hydrothermal method, the photogenerated carriers generated by the TiO 2 under illumination can be quickly transferred.
纳米TiO 2具有传统材料所不具备的特殊物理、化学特性，其化学稳定性高，无毒无污染，具有颗粒尺寸小、比表面积大、表面能高等特点，以及其特有的三大效应：表面效应、小尺寸效应和宏观量子隧道效应。 Nano-TiO 2 has special physical and chemical properties that traditional materials do not have. It has high chemical stability, non-toxic and non-polluting, small particle size, large specific surface area, high surface energy, etc., and its three unique effects: surface Effect, small size effect and macroscopic quantum tunneling effect.
三维石墨烯材料，在结构上不同于二维的石墨烯，二维石墨烯易团聚，难分散，很难获得高比表面积的材料，它具有三维空心多孔网状结构，网壁为石墨烯，为层状结构的石墨以及多孔的石墨碳泡沫，具有超低密度表面积、高导热、耐高温、耐腐蚀、延展性、柔韧性好等优点，单层透明且质量较高。Three-dimensional graphene material is different from two-dimensional graphene in structure. Two-dimensional graphene is easy to agglomerate and difficult to disperse, and it is difficult to obtain a material with a high specific surface area. It has a three-dimensional hollow porous network structure with graphene walls. Laminated graphite and porous graphitic carbon foams have the advantages of ultra-low density surface area, high thermal conductivity, high temperature resistance, corrosion resistance, ductility, and flexibility. The single layer is transparent and has high quality.
人们越来越重视空气质量指标和食品安全，为了去除空气中甲醛等有害有机物及杀灭空气中的各种有害悬浮菌和延长食品保鲜期，现有技术主要采用碳吸附甲醛，或HEPA技术过滤收集悬浮菌，以提高空气质量；用包装技术和冷藏的方法来延长食品保鲜期。因为活性炭的结构特点是孔隙多，具有很强的吸附力，很多消毒面具就是利用了活性炭的这个特点制成的。最好选择颗粒比较小的活性炭，颗粒越小吸附效果越好。但活性炭吸附甲醛，只能吸附，不能分解，甲醛仍然存在于空气中，不能让它彻底消失，并且活性炭易饱和可持续使用的时间很短。People are paying more and more attention to air quality indicators and food safety. In order to remove harmful organic matter such as formaldehyde in the air, kill various harmful suspended bacteria in the air and extend the food preservation period, the existing technology mainly adopts carbon adsorption formaldehyde or HEPA technology to filter. Collect suspended bacteria to improve air quality; use packaging technology and refrigeration methods to extend the shelf life of food. Because the structure of activated carbon is characterized by many pores and strong adsorption, many disinfection masks are made using this feature of activated carbon. It is best to choose activated carbon with relatively small particles. The smaller the particles, the better the adsorption effect. However, activated carbon can only adsorb formaldehyde and cannot be decomposed. Formaldehyde still exists in the air and cannot be completely disappeared. The activated carbon is easily saturated and can be used for a short period of time.
此外，食品中水果保鲜的普遍做法是在包装上下功夫，使用真空袋包装。用真空袋包装虽然能够起到一定的保鲜效果，但这种保鲜基本上是与氧气隔绝，并不能起到真正的杀菌作用，一些水果在真空袋中保鲜，不能正常呼吸，最后也会导致变味。并且使用真空袋价格昂贵，成本高。而冷冻技术的缺陷在于食品在化冻过程中容易滋生细菌，食品表面的蛋白质会被破坏，营养价值和新鲜口味都大打折扣。In addition, the common practice of keeping fresh fruits in food is to work hard on packaging and use vacuum bag packaging. Although packaging in a vacuum bag can achieve a certain preservation effect, this preservation is basically isolated from oxygen and cannot play a real sterilization effect. Some fruits are kept fresh in a vacuum bag and cannot breathe normally, which will eventually lead to a taste change. . And the use of vacuum bags is expensive and costly. The defect of freezing technology is that the food is prone to bacteria in the defrosting process, the protein on the food surface will be destroyed, and the nutritional value and fresh taste are greatly reduced.
因此，需要一种能将甲醛、苯、甲苯、二甲苯、氨、乙烯、TVOC等有害物质和细菌、病毒等氧化分解成无害的CO2和H2O，从而起到净化空气和保鲜作用的净化消毒装置。Therefore, there is a need for a purification and disinfection that can oxidize and decompose harmful substances such as formaldehyde, benzene, toluene, xylene, ammonia, ethylene, TVOC, bacteria, and viruses into harmless CO2 and H2O, thereby purifying the air and preserving freshness. Device.
技术问题technical problem
针对上述问题，本发明提供了一种应用高光催化效率材料，能够实现在常温下食物进行保鲜存放和除去室内有害甲醛及各种细菌和病毒的空气净化和杀菌灭病毒装置。In view of the above-mentioned problems, the present invention provides an air purification, sterilization and virus killing device that uses high photocatalytic efficiency materials to achieve fresh preservation and storage of food at room temperature and removal of indoor harmful formaldehyde, various bacteria and viruses.
技术解决方案Technical solutions
为解决上述技术问题，本发明所采用的技术方案是：一种空气净化和杀菌灭病毒装置，包括鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置、电源连接装置和外壳，所述鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置均与所述电源连接装置电连接，所述鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置、电源连接装置均与外壳固定连接，所述深紫外光源和光催化光源一起设置在鼓风装置和石墨烯光催化降解装置的中间，光催化光源照射在石墨烯光催化降解装置上，所述外壳开有通孔。In order to solve the above technical problems, the technical solution adopted by the present invention is: an air purification and sterilization virus killing device, including a blower device, a deep ultraviolet light source, a photocatalytic light source, a graphene photocatalytic degradation device, a power connection device, and The housing, the blowing device, the deep ultraviolet light source, the photocatalytic light source, and the graphene photocatalytic degradation device are all electrically connected to the power connection device, the blowing device, the deep ultraviolet light source, the photocatalytic light source, and the graphene The photocatalytic degradation device and the power connection device are all fixedly connected to the housing, the deep ultraviolet light source and the photocatalytic light source are arranged together between the air blowing device and the graphene photocatalytic degradation device, and the photocatalytic light source is irradiated on the graphene photocatalytic degradation device , The shell is provided with a through hole.
进一步的，进一步的，所述的鼓风装置为低电压电风扇，作用为推进空气循环。Further, further, the blowing device is a low-voltage electric fan, which functions to promote air circulation.
进一步的，所述深紫外光光源为不产生臭氧的220nm单一波长的灯管或LED光源。Further, the deep ultraviolet light source is a 220nm single-wavelength lamp tube or LED light source that does not generate ozone.
进一步的，所述光催化光源为波长为380-390nm的紫外光灯管或LED光源。Further, the photocatalytic light source is an ultraviolet light tube or LED light source with a wavelength of 380-390 nm.
进一步的，所述外壳的材质为不透光材料。Further, the material of the shell is an opaque material.
进一步的，所述石墨烯光催化降解装置包括基底层镍网或铜网、单层三维石墨烯层、TiO 2纳米球薄膜层和位于TiO 2纳米球薄膜层表面的纳米银层，所述的基底层的孔径为0.01-0.6mm，孔径优选0.01-0.1mm，所述的外层中TiO2纳米球的直径为5-100nm。所述石墨烯光催化降解装置中通入直流电流，所述电流为0.5A-1A。 Further, the graphene photocatalytic degradation device includes a base layer of nickel mesh or copper mesh, a single-layer three-dimensional graphene layer, a TiO 2 nanosphere film layer, and a nano silver layer on the surface of the TiO 2 nanosphere film layer. The pore size of the base layer is 0.01-0.6mm, preferably 0.01-0.1mm, and the diameter of the TiO2 nanospheres in the outer layer is 5-100nm. A direct current is passed through the graphene photocatalytic degradation device, and the current is 0.5A-1A.
一种所述空气净化和杀菌灭病毒装置的石墨烯光催化降解装置的制备方法，所述方法包括如下步骤：A preparation method of the graphene photocatalytic degradation device of the air purification, sterilization and virus killing device, the method includes the following steps:
1）在保护气和氢气、800~1300℃条件下，去除基底层表面氧化物层后再通入碳源气体，2-10分钟后关闭碳源，将样品迅速冷却至室温，关闭保护气和氢气；1) Under the conditions of protective gas and hydrogen at 800~1300℃, remove the oxide layer on the surface of the base layer and then pass in the carbon source gas. After 2-10 minutes, turn off the carbon source, cool the sample to room temperature quickly, turn off the protective gas and hydrogen;
2）冰浴下，将钛酸四丁酯缓慢搅拌滴加到乙醇中，滴加速率控制在1-2ml/min，超声混合均匀，继续加入纳米银粉末，超声混合均匀后，再将第一步的样品放入反应液中，在160-220℃下水热反应；2) Under ice bath, slowly stir and drop tetrabutyl titanate into ethanol, the dropping rate is controlled at 1-2ml/min, ultrasonic mixing is uniform, continue to add nano silver powder, ultrasonic mixing is uniform, and then the first The sample of step is put into the reaction solution and reacted hydrothermally at 160-220℃;
3）通入保护气，将第二步反应得到的样品清洗、干燥后加热到400~ 600℃反应，得到基底层/三维石墨烯/ TiO 2纳米球/纳米银薄膜。 3) Pass in protective gas, clean and dry the sample obtained in the second step of the reaction, and heat it to 400~600℃ to react to obtain a base layer/three-dimensional graphene/TiO 2 nanosphere/nano silver film.
进一步的，所述步骤1中所述的去除时间为5-20分钟，所述的碳源气体选自甲烷、甲醇、乙醇或乙烷中的一种或多种；所述的保护气选自氩气或氖气；所述的碳源气体为甲烷或乙烷时碳源气体的流速为1-10 s.c.c.m.，优选3-7 s.c.c.m.；所述的碳源气体为甲醇或乙醇时，用1-10 s.c.c.m.，优选3-7 s.c.c.m.的保护气鼓泡；所述的氢气的流速为100-300 s.c.c.m.，优选150-250 s.c.c.m.；所述的保护气流速为300-600 s.c.c.m.；所述的冷却速率为200-300℃/min。Further, the removal time in step 1 is 5-20 minutes, the carbon source gas is selected from one or more of methane, methanol, ethanol or ethane; the protective gas is selected from Argon or Neon; when the carbon source gas is methane or ethane, the flow rate of the carbon source gas is 1-10 s.c.c.m., preferably 3-7 s.c.c.m.; when the carbon source gas is methanol or ethanol, use 1-10 s.c.c.m., preferably 3-7 The protective gas of s.c.c.m. is bubbling; the flow rate of the hydrogen is 100-300 s.c.c.m., preferably 150-250 s.c.c.m.; the flow rate of the protective gas is 300-600 s.c.c.m.; The cooling rate is 200-300°C/min.
进一步的，步骤2中所述的钛酸四丁酯占乙醇质量的15-25%；所述的纳米银占乙醇质量的0.01-1%；所述的乙醇温度控制在0-5℃，所述的反应时间为4-24h。Further, the tetrabutyl titanate described in step 2 accounts for 15-25% of the ethanol mass; the nano-silver accounts for 0.01-1% of the ethanol mass; the ethanol temperature is controlled at 0-5°C, so The stated reaction time is 4-24h.
进一步的，步骤2中还包含加入二氧化硅纳米颗粒，所述二氧化硅纳米颗粒占乙醇质量的0.01-3%。Further, step 2 also includes adding silica nanoparticles, and the silica nanoparticles account for 0.01 to 3% of the ethanol by mass.
进一步的，所述步骤3中所述的干燥温度为50-80℃，所述的干燥条件为真空下，所述的干燥时间为3-4h；所述的加热温度优选400℃，所述的反应时间为0.5-3小时。Further, the drying temperature in step 3 is 50-80°C, the drying conditions are under vacuum, and the drying time is 3-4h; the heating temperature is preferably 400°C, The reaction time is 0.5-3 hours.
本发明提供的空气净化和杀菌灭病毒装置包含石墨烯光催化降解装置和220nm深紫外光这两大实现空气净化和杀菌灭毒功能模块。其中，石墨烯光催化降解装置由石墨烯复合二氧化钛和纳米银材料，二氧化钛在紫外光照射下发生光催化反应，纳米银在紫外光照射下产生大量的电子，大量电子快速进入到二氧化钛中，进一步加快光催化反应，并大幅度增加空穴数量，而石墨烯的高电子迁移率，可以有效延长光催化产生的载流子的寿命，防止空穴和电子复合，进一步大幅提升高催化效率。同时，纳米银表面大量电子跑掉后会形成大量的银离子（Ag +，Ag 2+，Ag 3+），Ag 2+和Ag 3+的还原势极高，可以使其周围空间产生原子氧，原子氧具有强氧化性可以消灭细菌，而Ag +可以吸附细菌体的蛋白酶并迅速与其结合在一起，破坏细菌体的蛋白酶，使其不能呼吸，从而杀死细菌。Ag+杀死细菌后又从细菌尸体中游离出来，再与其它菌落接触并重复该杀菌过程。石墨烯光催化降解装置光催化过程银离子的产生可以有效杀灭细菌和病毒，进一步提升了石墨烯光催化降解装置的杀菌消毒效率。而220nm深紫外光能够破坏细菌、病毒体内遗传物质DNA或RNA分子结构，使细菌和病毒失活或无法繁殖，从而阻断细菌和病毒不断复制和快速传播的途径。此外，二氧化钛纳米球的制备中，控制滴加速率和滴加温度，能够使二氧化钛生成大小均匀、比表面积大的球状结构，和纳米银一起均匀地分布于单层三维石墨烯表面，分散性好，既避免了自身粒子的团聚，也有效防止了石墨烯片层的重堆积，纳米复合材料所特有的结构使其具有很好的热稳定性和优异的光催化活性，在环境保护、功能复合材料和光催化等领域都有潜在的应用价值。 The air purification, sterilization and virus sterilization device provided by the present invention includes a graphene photocatalytic degradation device and a 220nm deep ultraviolet light, which are two functional modules that realize air purification, sterilization and sterilization. Among them, the graphene photocatalytic degradation device is composed of graphene composite titanium dioxide and nano silver material. Titanium dioxide undergoes a photocatalytic reaction under ultraviolet light irradiation. Nano silver generates a large number of electrons under ultraviolet light irradiation, and a large number of electrons quickly enter the titanium dioxide. Speeds up the photocatalytic reaction and greatly increases the number of holes. The high electron mobility of graphene can effectively extend the life of the carriers generated by photocatalysis, prevent the recombination of holes and electrons, and further greatly improve the high catalytic efficiency. At the same time, a large number of silver ions (Ag + , Ag 2+ , Ag 3+ ) will be formed after a large number of electrons on the surface of nano-silver run away. The reduction potential of Ag 2+ and Ag 3+ is extremely high, which can generate atomic oxygen in the surrounding space. , Atomic oxygen has strong oxidizing properties and can destroy bacteria, while Ag + can adsorb the protease of the bacterial body and quickly bind with it, destroy the protease of the bacterial body, make it unable to breathe, and kill the bacteria. After the Ag+ kills the bacteria, it is freed from the corpse of the bacteria, and then comes into contact with other colonies and repeats the sterilization process. The production of silver ions during the photocatalytic process of the graphene photocatalytic degradation device can effectively kill bacteria and viruses, and further improve the sterilization efficiency of the graphene photocatalytic degradation device. The 220nm deep ultraviolet light can destroy the DNA or RNA molecular structure of the genetic material in bacteria and viruses, and make bacteria and viruses inactivated or unable to reproduce, thereby blocking the continuous replication and rapid spread of bacteria and viruses. In addition, in the preparation of titanium dioxide nanospheres, by controlling the dropping rate and temperature, the titanium dioxide can form a spherical structure with uniform size and large specific surface area, which is uniformly distributed on the surface of a single-layer three-dimensional graphene together with nano-silver, with good dispersibility. , It not only avoids the agglomeration of its own particles, but also effectively prevents the re-stacking of graphene sheets. The unique structure of nanocomposites makes it have good thermal stability and excellent photocatalytic activity. Fields such as materials and photocatalysis have potential applications.
有益效果Beneficial effect
由上述对本发明结构的描述可知，和现有技术相比，本发明具有如下优点：From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages:
1、本发明进一步提高了光催化效率，可以高效降解甲醛等有害有机物，高效杀灭空气中的各种有害悬浮菌和病毒及食物表面的有害菌群；从而实现高效净化空气和延长食品保鲜期的目的。1. The present invention further improves the photocatalytic efficiency, can efficiently degrade harmful organic matter such as formaldehyde, and effectively kill various harmful suspended bacteria and viruses in the air and harmful bacteria on the surface of food; thereby achieving efficient air purification and prolonging food preservation period the goal of.
2、本发明的装置没有采用任何滤网，不存在任何吸附现象，不会产生二次污染，可以高效将甲醛等有害VOC氧化分解成无害的CO 2和H 2O，无反弹高效杀灭病毒和细菌，根除密闭空间中的空气悬浮菌，实现了长期高效净化空气。 2. The device of the present invention does not use any filter, does not have any adsorption phenomenon, and does not produce secondary pollution. It can efficiently oxidize and decompose harmful VOCs such as formaldehyde into harmless CO 2 and H 2 O, and kill efficiently without rebound. Viruses and bacteria eradicate air-suspended bacteria in confined spaces, realizing long-term high-efficiency air purification.
3、本发明的装置可以杀死密闭空间内物体表面的菌群，实现了常温保存食物，并且节能环保，安全实用。3. The device of the present invention can kill the bacteria on the surface of the object in the confined space, realizes the preservation of food at room temperature, is energy-saving and environmentally friendly, and is safe and practical.
4、运用本发明提供石墨烯光催化降解装置制成的保鲜仪器能够有效杀菌，灭病毒，去除甲醛等有机物，保证空气质量，还能够杀菌消毒，延长食品保鲜期。4. The fresh-keeping instrument made by the graphene photocatalytic degradation device provided by the present invention can effectively sterilize, kill viruses, remove organic matter such as formaldehyde, ensure air quality, and can also sterilize and prolong food preservation period.
附图说明Description of the drawings
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:
图1为本发明一种空气净化和杀菌灭病毒装置的结构示意图；Figure 1 is a schematic diagram of the structure of an air purification, sterilization and virus killing device of the present invention;
图2为本发明提供的石墨烯光催化降解装置的结构示意图。Fig. 2 is a schematic structural diagram of a graphene photocatalytic degradation device provided by the present invention.
图3为本发明提供的石墨烯光催化降解装置降解甲醛的结果图。Figure 3 is a graph showing the result of degradation of formaldehyde by the graphene photocatalytic degradation device provided by the present invention.
图4为本发明提供的石墨烯光催化降解装置净化H1N1甲型流感病毒的结果图。Fig. 4 is a graph showing the results of purification of H1N1 influenza A virus by the graphene photocatalytic degradation device provided by the present invention.
图5为本发明提供的石墨烯光催化降解装置净化大肠杆菌噬菌体病毒的结果图。Figure 5 is a graph showing the results of purification of coliphage viruses by the graphene photocatalytic degradation device provided by the present invention.
图6为本发明提供的石墨烯光催化降解装置净化MS2噬菌体病毒的结果图。Fig. 6 is a graph showing the result of purification of MS2 phage virus by the graphene photocatalytic degradation device provided by the present invention.
图7为本发明提供的石墨烯光催化降解装置杀灭表皮葡萄球菌的结果图。Fig. 7 is a graph showing the results of killing Staphylococcus epidermidis by the graphene photocatalytic degradation device provided by the present invention.
图8为本发明提供的石墨烯光催化降解装置杀灭荧光假单胞菌的结果图。Fig. 8 is a graph showing the result of killing Pseudomonas fluorescens by the graphene photocatalytic degradation device provided by the present invention.
图9为本发明提供的石墨烯光催化降解装置杀灭白色葡萄球菌的结果图。Fig. 9 is a graph showing the result of killing Staphylococcus albicans by the graphene photocatalytic degradation device provided by the present invention.
本发明的实施方式Embodiments of the present invention
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.
如图1所示本发明的空气净化和杀菌灭病毒装置由鼓风装置1、深紫外光光源2、光催化光源3、石墨烯光催化降解装置4、电源连接装置5和外壳，所述鼓风装置1、深紫外光光源2、光催化光源3、石墨烯光催化降解装置4均与所述电源连接装置5相连接；所述鼓风装置1、深紫外光光源2、光催化光源3、石墨烯光催化降解装置4、电源连接装置5均与所述外壳固定；所述深紫外光源2和光催化光源3一起设置在鼓风装置1和石墨烯光催化降解装置4的中间，光催化光源3照射在石墨烯光催化降解装置4上所述外壳开有数个通孔。其中，石墨烯光催化降解装置4可通入0.5A-1A的直流电流；深紫外光光源2为220nm单一波长的灯管或LED光源，且220nmLED光源不产生臭氧；光催化光源3为波长为380-390nm的紫外光灯管或LED光源中的一种。鼓风装置为低电压电风扇，作用为推进空气循环。电源连接装置5为鼓风装置1、深紫外光光源2、光催化光源3、石墨烯光催化降解装置4供电。外壳的材质为不透光材料。As shown in Figure 1, the air purification and sterilization device of the present invention consists of a blower device 1, a deep ultraviolet light source 2, a photocatalytic light source 3, a graphene photocatalytic degradation device 4, a power connection device 5 and a housing, the drum The wind device 1, the deep ultraviolet light source 2, the photocatalytic light source 3, and the graphene photocatalytic degradation device 4 are all connected to the power connection device 5; the blowing device 1, the deep ultraviolet light source 2, the photocatalytic light source 3 The graphene photocatalytic degradation device 4 and the power connection device 5 are all fixed to the housing; the deep ultraviolet light source 2 and the photocatalytic light source 3 are arranged together in the middle of the air blowing device 1 and the graphene photocatalytic degradation device 4. The light source 3 irradiates the graphene photocatalytic degradation device 4 with a plurality of through holes in the housing. Among them, the graphene photocatalytic degradation device 4 can pass a direct current of 0.5A-1A; the deep ultraviolet light source 2 is a 220nm single-wavelength lamp or LED light source, and the 220nm LED light source does not produce ozone; the photocatalytic light source 3 has a wavelength of One of 380-390nm ultraviolet light tube or LED light source. The blowing device is a low-voltage electric fan, which is used to promote air circulation. The power connection device 5 supplies power to the blowing device 1, the deep ultraviolet light source 2, the photocatalytic light source 3, and the graphene photocatalytic degradation device 4. The material of the shell is opaque material.
所述石墨烯光催化降解装置4包括基底层镍网或铜网4-1、单层三维石墨烯层4-2、TiO 2纳米球薄膜层4-3和位于TiO 2纳米球薄膜层4-3表面的纳米银层4-4。其中，基底层4-1的孔径为0.01-0.6mm，孔径优选0.01-0.1 mm。TiO 2纳米球薄膜层4-3的TiO 2纳米球直径为5-100 nm。 The graphene photocatalytic degradation device 4 includes a base layer of nickel mesh or copper mesh 4-1, a single-layer three-dimensional graphene layer 4-2, a TiO 2 nanosphere film layer 4-3, and a TiO 2 nanosphere film layer 4- 3 Nano silver layer 4-4 on the surface. Among them, the pore size of the base layer 4-1 is 0.01-0.6 mm, and the pore size is preferably 0.01-0.1 mm. TiO TiO 2 thin-film layer 4-3 nanosphere 2 nanosphere having a diameter of 5-100 nm.
一种所述空气净化和杀菌灭病毒装置的石墨烯光催化降解装置的制备方法，所述方法包括如下步骤：A preparation method of the graphene photocatalytic degradation device of the air purification, sterilization and virus killing device, the method includes the following steps:
1）在保护气和氢气、800 ~ 1300℃条件下，去除基底层表面氧化物层后再通入碳源气体，2-10分钟后关闭碳源，将样品迅速冷却至室温，关闭保护气和氢气；1) In the protective gas and hydrogen, 800 ~ Under the condition of 1300℃, remove the oxide layer on the surface of the base layer and then pass in the carbon source gas, turn off the carbon source after 2-10 minutes, quickly cool the sample to room temperature, turn off the protective gas and hydrogen;
2）冰浴下，将钛酸四丁酯缓慢搅拌滴加到乙醇中，滴加速率控制在1-2ml/min，超声混合均匀，继续加入纳米银粉末，超声混合均匀后，再将第一步的样品放入反应液中，在160-220℃下水热反应；2) Under ice bath, slowly stir and drop tetrabutyl titanate into ethanol, the dropping rate is controlled at 1-2ml/min, ultrasonic mixing is uniform, continue to add nano silver powder, ultrasonic mixing is uniform, and then the first The sample of step is put into the reaction solution and reacted hydrothermally at 160-220℃;
3）通入保护气，将第二步反应得到的样品清洗、干燥后加热到400~ 600℃反应，得到基底层/三维石墨烯/ TiO 2纳米球/纳米银薄膜。 3) Pass in protective gas, clean and dry the sample obtained in the second step of the reaction, and heat it to 400~600℃ to react to obtain a base layer/three-dimensional graphene/TiO 2 nanosphere/nano silver film.
一种石墨烯光催化降解装置的制备方法通过以下实施例制备：A preparation method of a graphene photocatalytic degradation device is prepared by the following examples:
实施例1Example 1
将镍网（孔径0.01mm）放置在水平管式炉中，通入氩气（流速500 s.c.c.m）和氢气(200 s.c.c.m.)、1000℃条件下，加热10分钟，去除表面氧化物层后，再通入甲烷气体(5 s.c.c.m.)，5分钟后，关闭甲烷气体，保持氩气和氢气的流速不变，将样品以200℃/min的速率快速冷却至室温，关闭氩气和氢气，制得单层三维石墨烯。冰浴下，将钛酸四丁酯5g以1ml/min的滴加速率缓慢搅拌滴加到20g乙醇中，乙醇温度控制在0℃，超声混合均匀，继续加入0.05g的纳米银，超声混合均匀后，再将制得单层三维石墨烯放入反应液中，在160℃下置于水热反应釜中进行水热反应4h。通入氮气，将水热反应得到的样品清洗、于50℃下干燥3h后加热到500℃反应1h，得到基底层/三维石墨烯/ TiO2纳米球/纳米银薄膜即光催化降解装置4。Place the nickel mesh (aperture 0.01mm) in a horizontal tube furnace, and pass argon gas (flow rate 500 s.c.c.m) and hydrogen (200 s.c.c.m.), 1000℃, heat for 10 minutes to remove the surface oxide layer, and then pass in methane gas (5 s.c.c.m.), after 5 minutes, turn off the methane gas, keep the flow rates of argon and hydrogen unchanged, quickly cool the sample to room temperature at a rate of 200°C/min, turn off the argon and hydrogen, to obtain a single-layer three-dimensional graphene. Under ice bath, add 5g of tetrabutyl titanate to 20g of ethanol with slow stirring at a dropping rate of 1ml/min. The temperature of ethanol is controlled at 0℃, and ultrasonically mix well. Continue to add 0.05g of nano-silver, and ultrasonically mix well. After that, the prepared single-layer three-dimensional graphene was put into the reaction solution, and placed in a hydrothermal reaction kettle at 160° C. for hydrothermal reaction for 4 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 50°C for 3 hours and then heat it to 500°C for 1 hour to obtain a base layer/three-dimensional graphene/ The TiO2 nanosphere/nano silver film is the photocatalytic degradation device 4.
实施例2Example 2
将镍网（孔径0.01mm）放置在水平管式炉中，通入氩气（流速600 s.c.c.m）和氢气(250 s.c.c.m.)、900℃条件下，加热20分钟，去除表面氧化物层后，再通入甲烷气体(10 s.c.c.m.)，5分钟后，关闭甲烷气体，保持氩气和氢气的流速不变，将样品以250℃/min的速率快速冷却至室温，关闭氩气和氢气。冰浴下，将钛酸四丁酯5g以1.5ml/min的滴加速率缓慢搅拌滴加到25g乙醇中，乙醇温度控制在5℃，超声混合均匀，继续加入0.1g的纳米银，0.1g的二氧化硅纳米颗粒，超声混合均匀后，再将制得单层三维石墨烯放入反应液中，在220℃下置于水热反应釜中进行水热反应24h。通入氮气，将水热反应得到的样品清洗、于80℃下干燥4h后加热到600℃反应0.5h，得到基底层/三维石墨烯/ TiO2纳米球/纳米银薄膜即石墨烯光催化降解装置4。Place the nickel mesh (aperture 0.01mm) in a horizontal tube furnace, and pass argon gas (flow rate 600 s.c.c.m) and hydrogen (250 s.c.c.m.), at 900℃, heating for 20 minutes to remove the surface oxide layer, then pass in methane gas (10 s.c.c.m.), after 5 minutes, turn off the methane gas, keep the flow rates of argon and hydrogen unchanged, quickly cool the sample to room temperature at a rate of 250°C/min, and turn off the argon and hydrogen. Under ice bath, add 5g of tetrabutyl titanate to 25g of ethanol with slow stirring at a dropping rate of 1.5ml/min. The temperature of ethanol is controlled at 5℃, and the mixture is mixed uniformly by ultrasonic, continue to add 0.1g of nano silver, 0.1g After mixing the silicon dioxide nano particles uniformly by ultrasonic, the prepared single-layer three-dimensional graphene is put into the reaction solution and placed in a hydrothermal reaction kettle at 220° C. for hydrothermal reaction for 24 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 80°C for 4 hours, and then heat it to 600°C for 0.5 hours to obtain a base layer/three-dimensional graphene/ TiO2 nanosphere/nano silver film, ie, graphene photocatalytic degradation device 4.
实施例3Example 3
将镍网（孔径0.1mm）放置在水平管式炉中，通入氖气（流速300 s.c.c.m）和氢气(100 s.c.c.m.)、800℃条件下，加热10分钟，去除表面氧化物层后，再通入乙烷气体(1 s.c.c.m.)，10分钟后，关闭乙烷气体，保持氖气和氢气的流速不变，将样品以200℃/min的速率快速冷却至室温，关闭氖气和氢气。冰浴下，将钛酸四丁酯6g以2ml/min的滴加速率缓慢搅拌滴加到40g乙醇中，乙醇温度控制在3℃，超声混合均匀，继续加入0.02g的纳米银，超声混合均匀后，再将制得单层三维石墨烯放入反应液中，在180℃下置于水热反应釜中进行水热反应16h。通入氮气，将水热反应得到的样品清洗、于60℃下干燥4h后加热到400℃反应3h，得到基底层/三维石墨烯/ TiO2纳米球/纳米银薄膜即石墨烯光催化降解装置4。Place the nickel mesh (aperture diameter of 0.1mm) in a horizontal tube furnace, and pass neon gas (flow rate 300 s.c.c.m) and hydrogen (100 s.c.c.m.), at 800℃, heat for 10 minutes to remove the surface oxide layer, and then pass in ethane gas (1 s.c.c.m.), after 10 minutes, turn off the ethane gas, keep the flow rates of neon and hydrogen unchanged, quickly cool the sample to room temperature at a rate of 200°C/min, and turn off the neon and hydrogen. Under ice bath, add 6g of tetrabutyl titanate into 40g of ethanol with slow stirring at a dropping rate of 2ml/min. The temperature of the ethanol is controlled at 3℃, and ultrasonically mix uniformly. Continue to add 0.02g of nano-silver, and ultrasonically mix uniformly. Afterwards, the prepared single-layer three-dimensional graphene was put into the reaction solution, and placed in a hydrothermal reaction kettle at 180° C. for hydrothermal reaction for 16 hours. Blow in nitrogen, clean the sample obtained from the hydrothermal reaction, dry it at 60°C for 4 hours, and then heat it to 400°C for 3 hours to obtain a base layer/three-dimensional graphene/ TiO2 nanosphere/nano silver film, ie, graphene photocatalytic degradation device 4.
甲醛降解结果Formaldehyde degradation results
检测过程：在4m3的密闭空间内放置本发明提供的6W的小型净化空气和保鲜装置，密闭空间内甲醛初始浓度为1ppm，然后打开装置，每5分钟检测一次密闭空间中甲醛浓度；而作为对比实验，密闭空间内甲醛初始浓度也为1ppm，不放置装置，每30分钟检测一次密闭空间内的甲醛浓度。图3所示，放置本发明提供的净化空气和保鲜装置120min密闭空间的甲醛降解效率达到90%左右，160min达到97%左右；而不放置装置，密闭空间的甲醛在3小时后仍保留98%以上。Detection process: Place the 6W small air purification and preservation device provided by the present invention in a 4m3 confined space, the initial concentration of formaldehyde in the confined space is 1ppm, and then turn on the device to check the concentration of formaldehyde in the confined space every 5 minutes; as a comparison In the experiment, the initial concentration of formaldehyde in the confined space is also 1 ppm, and the device is not placed, and the concentration of formaldehyde in the confined space is detected every 30 minutes. As shown in Figure 3, the formaldehyde degradation efficiency of the air-purified and fresh-keeping device provided by the present invention for 120 minutes in the closed space reaches about 90%, 160 minutes to about 97%; without the device, the formaldehyde in the closed space still retains 98% after 3 hours above.
杀灭病毒结果Virus killing result
将本发明技术方案组装的空气净化装置送到第三方检测机构检测空气中病毒的净化效率。图4所示为广州市微生物研究所检测结果显示三组H1N1甲型流感病毒60分钟的净化率分别为98.88%、97.82%、98.53%。图5所示为广州工业微生物检测中心检测结果显示大肠杆菌噬菌体病毒1小时的平均去除率高达99.72%。图6所示为RTI INTERNATIONAL检测结果显示，MS2噬菌体病毒的净化效率是自然衰减率的12倍。综上说明本发明提供的装置可以高效杀灭空气中的病毒。The air purification device assembled by the technical scheme of the present invention is sent to a third-party testing agency to detect the purification efficiency of viruses in the air. Figure 4 shows that the test results of the Guangzhou Institute of Microbiology show that the 60-minute purification rates of the three groups of H1N1 influenza A viruses are 98.88%, 97.82%, and 98.53%, respectively. Figure 5 shows the test results of Guangzhou Industrial Microbiology Testing Center, showing that the average removal rate of coliphage virus in 1 hour is as high as 99.72%. Figure 6 shows the RTI INTERNATIONAL test results show that the purification efficiency of MS2 phage virus is 12 times the natural decay rate. In summary, the device provided by the present invention can effectively kill viruses in the air.
杀灭细菌结果Bacteria kill result
将本发明技术方案组装的空气净化装置送到第三方检测机构检测细菌的净化效率。图7和8所示为RTI INTERNATIONAL检测结果分别显示，表皮葡萄球菌和荧光假单胞菌的净化效率分别是自然衰减率的72倍和5倍；图9广东省微生物分析检测中心检测结果显示，白色葡萄球菌的杀灭率高达98.77%。综上说明本发明提供的装置杀灭细菌效率高，可以很好的杀灭食物表面的细菌群体，防止食物腐坏，实现食品保鲜和延长食品的保质期。The air purification device assembled by the technical solution of the present invention is sent to a third-party testing agency to test the purification efficiency of bacteria. Figures 7 and 8 show the RTI International test results respectively show that the purification efficiency of Staphylococcus epidermidis and Pseudomonas fluorescens are 72 times and 5 times of the natural attenuation rate respectively; Figure 9 The test results of Guangdong Microbiological Analysis and Testing Center show that the killing rate of Staphylococcus albicans is as high as 98.77%. To sum up, it shows that the device provided by the present invention has high efficiency in killing bacteria, can well kill bacteria groups on the surface of food, prevent food from spoiling, and realize food preservation and extend the shelf life of food.
本发明的原理是：纳米TiO2光催化降解机理共分为8个步骤来完成光催化的过程：The principle of the present invention is: the nano-TiO2 photocatalytic degradation mechanism is divided into 8 steps to complete the photocatalytic process:
a. TiO 2 + hv→ eˉ+ h + a. TiO 2 + hv→ eˉ+ h +
b. h + + H 2O→OH + H + b. h + + H 2 O→OH + H +
c. eˉ+ O 2→OOˉ c. eˉ+ O 2 →OOˉ
d. OOˉ+H+ →OOH d. OOˉ+H+ →OOH
e. 2OOH → O 2 + H 2O 2 e. 2OOH → O 2 + H 2 O 2
f. OOˉ+ eˉ+ 2H +→H 2O 2 f. OOˉ+ eˉ+ 2H + →H 2 O 2
g. H 2O 2 + eˉ→OH + OHˉ g. H 2 O 2 + eˉ→OH + OHˉ
h. h + + OHˉ→OH h. h + + OHˉ→OH
当一个具有hv能量大小的光子或者具有大于半导体禁带宽度Eg的光子射入半导体时，一个电子由价带(VB)激发到导带(CB)，因而在导带上产生一个高活性电子（eˉ )，在价带上留下了一个空穴(h +)，形成氧化还原体系。溶解氧及水和电子及空穴相互作用，最终产生高活性的羟基。OHˉ、O 2ˉ、OOHˉ自由基具有强氧化性，能把大多数吸附在TiO 2表面的有机污染物降解为CO 2、H 2O，把无机污染物氧化或还原为无害物。 When a photon with hv energy or a photon larger than the semiconductor forbidden band width Eg enters the semiconductor, an electron is excited from the valence band (VB) to the conduction band (CB), thereby generating a highly active electron in the conduction band ( eˉ ), leaving a hole (h + ) in the valence band to form a redox system. Dissolved oxygen and water interact with electrons and holes to eventually produce highly active hydroxyl groups. OHˉ, O 2 ˉ, OOHˉ radicals have strong oxidizing properties, which can degrade most organic pollutants adsorbed on the surface of TiO 2 into CO 2 and H 2 O, and oxidize or reduce inorganic pollutants to harmless substances.
此外，纳米银在紫外光照下产生的银离子破坏细菌体的蛋白酶，使其不能呼吸，杀死细菌。220nm的深紫外光破坏细菌、病毒体内遗传物质DNA或RNA分子结构，使细菌和病毒失活或无法繁殖，从而阻断细菌和病毒不断复制和快速传播的途径。实现高效杀菌灭病毒。In addition, the silver ions produced by nano-silver under ultraviolet light destroy the protease of the bacterial body, making it unable to breathe and killing the bacteria. The 220nm deep ultraviolet light destroys the DNA or RNA molecular structure of the genetic material in bacteria and viruses, and makes bacteria and viruses inactivated or unable to reproduce, thereby blocking the continuous replication and rapid spread of bacteria and viruses. Achieve efficient sterilization and elimination of viruses.
本发明进一步提高了光催化效率，可以高效降解甲醛等有害有机物，高效杀灭空气中的各种有害悬浮菌和病毒及食物表面的有害菌群；从而实现高效净化空气和延长食品保鲜期的目的。The invention further improves the photocatalytic efficiency, can efficiently degrade harmful organic matter such as formaldehyde, and effectively kill various harmful suspended bacteria and viruses in the air and harmful bacteria on the food surface; thereby achieving the purpose of efficiently purifying the air and extending the food preservation period .
a）甲醛降解效率：120分钟90%左右，160分钟97%左右。a) Formaldehyde degradation efficiency: about 90% for 120 minutes and 97% for 160 minutes.
b）H1N1甲型流感病毒杀灭率60分钟高达98.99%（广州市微生物研究所的检测结果）；大肠杆菌噬菌体病毒杀灭率1小时高达99.72%（广州工业微生物检测中心的检测结果）；MS2噬菌体净化效率是自然衰减率的12倍（RTI INTERNATIONAL检测结果）。b) The killing rate of H1N1 influenza A virus in 60 minutes is as high as 98.99% (the test result of Guangzhou Institute of Microbiology); the killing rate of coliphage virus is as high as 99.72% in one hour (the test result of Guangzhou Industrial Microbiology Testing Center); MS2 The purification efficiency of phage is 12 times of the natural decay rate (RTI INTERNATIONAL test results).
c）表皮葡萄球菌净化效率是自然衰减率的72倍(RTI INTERNATIONAL检测结果）；荧光假单胞菌净化效率是自然衰减率的5倍(RTIINTERNATIONAL检测结果）；白色葡萄球菌的杀灭率高达98.77%（广东省微生物分析检测中心检测结果）。c) The purification efficiency of Staphylococcus epidermidis is 72 times of the natural decay rate (RTI INTERNATIONAL test results); the purification efficiency of Pseudomonas fluorescens is 5 times of the natural attenuation rate (RTIINTERNATIONAL test results); the killing rate of Staphylococcus albicans is as high as 98.77% (test results of Guangdong Microbial Analysis and Testing Center).
本发明的装置没有采用任何滤网，不存在任何吸附现象，不会产生二次污染，可以高效将甲醛等有害VOC氧化分解成无害的CO 2和H 2O，无反弹高效杀灭病毒和细菌，根除密闭空间中的空气悬浮菌，实现了长期高效净化空气。 The device of the present invention does not use any filter screen, does not have any adsorption phenomenon, does not produce secondary pollution, can efficiently oxidize and decompose harmful VOCs such as formaldehyde into harmless CO 2 and H 2 O, and effectively kill viruses and viruses without rebound. Bacteria, eradicate air-suspended bacteria in confined spaces, and achieve long-term high-efficiency air purification.
本发明的装置可以杀死密闭空间内物体表面的菌群，实现了常温保存食物，并且节能环保，安全实用。The device of the present invention can kill the flora on the surface of the object in the confined space, realizes the preservation of food at room temperature, is energy-saving and environmentally friendly, and is safe and practical.
运用本发明提供石墨烯光催化降解装置制成的保鲜仪器能够有效杀菌，灭病毒，去除甲醛等有机物，保证空气质量，还能够杀菌消毒，延长食品保鲜期。The fresh-keeping instrument made of the graphene photocatalytic degradation device provided by the present invention can effectively sterilize, kill viruses, remove organic matter such as formaldehyde, ensure air quality, and can also sterilize and prolong food preservation period.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above descriptions are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims (10)

  1. 一种空气净化和杀菌灭病毒装置，其特征在于：包括鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置、电源连接装置和外壳，所述鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置均与所述电源连接装置电连接，所述鼓风装置、深紫外光光源、光催化光源、石墨烯光催化降解装置、电源连接装置均与外壳固定连接，所述深紫外光源和光催化光源一起设置在鼓风装置和石墨烯光催化降解装置的中间，光催化光源照射在石墨烯光催化降解装置上，所述外壳开有通孔。An air purification, sterilization and virus killing device, which is characterized in that it comprises an air blowing device, a deep ultraviolet light source, a photocatalytic light source, a graphene photocatalytic degradation device, a power connection device and a housing. The air blowing device, deep ultraviolet light The light source, the photocatalytic light source, and the graphene photocatalytic degradation device are all electrically connected to the power connection device, and the blower device, the deep ultraviolet light source, the photocatalytic light source, the graphene photocatalytic degradation device, and the power connection device are all connected to the housing In a fixed connection, the deep ultraviolet light source and the photocatalytic light source are arranged together between the blowing device and the graphene photocatalytic degradation device, the photocatalytic light source irradiates the graphene photocatalytic degradation device, and the shell is provided with a through hole.
  2. 根据权利要求1所述一种空气净化和杀菌灭病毒装置，其特征在于：所述深紫外光光源为不产生臭氧的220nm单一波长的灯管或LED光源。The air purification and sterilization device according to claim 1, wherein the deep ultraviolet light source is a 220nm single-wavelength lamp or LED light source that does not produce ozone.
  3. 根据权利要求1所述一种空气净化和杀菌灭病毒装置，其特征在于：所述光催化光源为波长为380-390nm的紫外光灯管或LED光源。The air purification and sterilization device according to claim 1, wherein the photocatalytic light source is an ultraviolet light tube or LED light source with a wavelength of 380-390 nm.
  4. 根据权利要求1所述一种空气净化和杀菌灭病毒装置，其特征在于：所述外壳的材质为不透光材料。The air purification, sterilization and virus killing device according to claim 1, wherein the material of the outer shell is an opaque material.
  5. 根据权利要求1所述一种空气净化和杀菌灭病毒装置，其特征在于：所述石墨烯光催化降解装置包括基底层镍网或铜网、单层三维石墨烯层、TiO 2纳米球薄膜层和位于TiO 2纳米球薄膜层表面的纳米银层，所述的基底层的孔径为0.01-0.6mm，孔径优选0.01-0.1 mm，所述的外层中TiO 2纳米球的直径为5-100 nm。 The air purification and sterilization device according to claim 1, wherein the graphene photocatalytic degradation device comprises a base layer of nickel mesh or copper mesh, a single-layer three-dimensional graphene layer, and a TiO 2 nanosphere film layer And the nano silver layer on the surface of the TiO 2 nanosphere film layer, the pore size of the base layer is 0.01-0.6 mm, preferably 0.01-0.1 mm, and the diameter of the TiO 2 nanosphere in the outer layer is 5-100 nm.
  6. 一种权利要求1所述空气净化和杀菌灭病毒装置的石墨烯光催化降解装置的制备方法，其特征在于：所述方法包括如下步骤：A method for preparing a graphene photocatalytic degradation device for an air purification, sterilization and virus killing device according to claim 1, wherein the method comprises the following steps:
    1）在保护气和氢气、800 ~ 1300℃条件下，去除基底层表面氧化物层后再通入碳源气体，2-10分钟后关闭碳源，将样品迅速冷却至室温，关闭保护气和氢气；1) In the protective gas and hydrogen, 800 ~ Under the condition of 1300℃, remove the oxide layer on the surface of the base layer and then pass in the carbon source gas, turn off the carbon source after 2-10 minutes, quickly cool the sample to room temperature, turn off the protective gas and hydrogen;
    2）冰浴下，将钛酸四丁酯缓慢搅拌滴加到乙醇中，滴加速率控制在1-2ml/min，超声混合均匀，继续加入纳米银粉末，超声混合均匀后，再将第一步的样品放入反应液中，在160-220℃下水热反应；2) Under ice bath, slowly stir and drop tetrabutyl titanate into ethanol, the dropping rate is controlled at 1-2ml/min, ultrasonic mixing is uniform, continue to add nano silver powder, ultrasonic mixing is uniform, and then the first The sample of step is put into the reaction solution and reacted hydrothermally at 160-220℃;
    3）通入保护气，将第二步反应得到的样品清洗、干燥后加热到400~ 600℃反应，得到基底层/三维石墨烯/ TiO 2纳米球/纳米银薄膜。 3) Pass in protective gas, clean and dry the sample obtained in the second step of the reaction, and heat it to 400~600℃ to react to obtain a base layer/three-dimensional graphene/TiO 2 nanosphere/nano silver film.
  7. 根据权利要求6所述一种石墨烯光催化降解装置的制备方法，其特征在于：所述步骤1中所述的去除时间为5-20分钟，所述的碳源气体选自甲烷、甲醇、乙醇或乙烷中的一种或多种；所述的保护气选自氩气或氖气；所述的碳源气体为甲烷或乙烷时碳源气体的流速为1-10 s.c.c.m.，优选3-7 s.c.c.m.；所述的碳源气体为甲醇或乙醇时，用1-10 s.c.c.m.，优选3-7 s.c.c.m.的保护气鼓泡；所述的氢气的流速为100-300 s.c.c.m.，优选150-250 s.c.c.m.；所述的保护气流速为300-600 s.c.c.m.；所述的冷却速率为200-300℃/min。The method for preparing a graphene photocatalytic degradation device according to claim 6, wherein the removal time in the step 1 is 5-20 minutes, and the carbon source gas is selected from methane, methanol, One or more of ethanol or ethane; the protective gas is selected from argon or neon; when the carbon source gas is methane or ethane, the flow rate of the carbon source gas is 1-10 s.c.c.m., preferably 3-7 s.c.c.m.; when the carbon source gas is methanol or ethanol, use 1-10 s.c.c.m., preferably 3-7 The protective gas of s.c.c.m. is bubbling; the flow rate of the hydrogen is 100-300 s.c.c.m., preferably 150-250 s.c.c.m.; the flow rate of the protective gas is 300-600 s.c.c.m.; The cooling rate is 200-300°C/min.
  8. 根据权利要求6所述一种石墨烯光催化降解装置的制备方法，其特征在于：步骤2中所述的钛酸四丁酯占乙醇质量的15-25%；所述的纳米银占乙醇质量的0.01-1%；所述的乙醇温度控制在0-5℃，所述的反应时间为4-24h。The method for preparing a graphene photocatalytic degradation device according to claim 6, wherein the tetrabutyl titanate in step 2 accounts for 15-25% of the mass of ethanol; and the nano-silver accounts for the mass of ethanol. The ethanol temperature is controlled at 0-5°C, and the reaction time is 4-24h.
  9. 根据权利要求6所述一种石墨烯光催化降解装置的制备方法，其特征在于：步骤2中还包含加入二氧化硅纳米颗粒，所述二氧化硅纳米颗粒占乙醇质量的0.01-3%。The method for preparing a graphene photocatalytic degradation device according to claim 6, characterized in that: step 2 further comprises adding silica nanoparticles, and the silica nanoparticles account for 0.01 to 3% of the mass of ethanol.
  10. 根据权利要求6所述一种石墨烯光催化降解装置的制备方法，其特征在于：所述步骤3中所述的干燥温度为50-80℃，所述的干燥条件为真空下，所述的干燥时间为3-4h；所述的加热温度优选400℃，所述的反应时间为0.5-3小时。The method for preparing a graphene photocatalytic degradation device according to claim 6, wherein the drying temperature in the step 3 is 50-80°C, and the drying condition is under vacuum. The drying time is 3-4 hours; the heating temperature is preferably 400°C, and the reaction time is 0.5-3 hours.
PCT/CN2020/091080 2020-05-19 2020-05-19 Air purification, sterilization and virus inactivation device WO2021232244A1 (en)

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