CN112050312B - Formaldehyde removing device and preparation method thereof - Google Patents
Formaldehyde removing device and preparation method thereof Download PDFInfo
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- CN112050312B CN112050312B CN201910491088.4A CN201910491088A CN112050312B CN 112050312 B CN112050312 B CN 112050312B CN 201910491088 A CN201910491088 A CN 201910491088A CN 112050312 B CN112050312 B CN 112050312B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
Abstract
The invention discloses a formaldehyde removing device and a preparation method thereof, wherein the formaldehyde removing device comprises an air purification filter screen and a plasma generating device which are coaxially arranged, the plasma generating device and the air purification filter screen are respectively close to an air inlet and an air outlet, a nano zinc oxide graphene coating is uniformly arranged on the surface of the air purification filter screen, the thickness of the nano zinc oxide graphene coating is 0.3-1.5 mm, the nano zinc oxide graphene coating comprises nano zinc oxide and graphene, and the mass ratio of the nano zinc oxide graphene coating to the nano graphene is (50-300): (1-3). The formaldehyde removing device provided by the invention has the advantages of simple structure, strong practicability, safety, no pollution and high efficiency.
Description
Technical Field
The invention relates to a formaldehyde removing device and a preparation method thereof.
Background
The formaldehyde is a main organic pollutant for indoor air pollution, the formaldehyde pollution is particularly serious in the indoor environment which is newly decorated, and people can feel dizziness, cough and even have the risk of cancer when breathing air containing excessive formaldehyde. At present, the methods for removing formaldehyde in household include physical adsorption method, chemical method (photocatalytic oxidation method, plasma method and the like) and ventilation method. The release period of formaldehyde in the indoor air is 3-5 years, the concentration is low, the problems of energy consumption, removal rate, airspeed and the like exist by selecting a single physical or chemical method, the ventilation also needs a long-time slow action, and the traditional treatment processes are not suitable for treating indoor air pollution. Therefore, a new method for efficiently and thoroughly removing formaldehyde in indoor air needs to be researched.
Graphene has found widespread use in recent years, mainly because it has many excellent properties, such as: high strength, high electric and thermal conductivity, and large specific surface area (2630 m)2And/g) has strong surface activity, and is a good catalyst carrier. The ZnO has the forbidden band width Eg of 3.36eV, is a photocatalyst with low price, no toxicity and good chemical stability, and can be used as an excellent catalyst for degrading organic pollutants.
The low-temperature plasma-catalysis technology is to introduce a catalyst into a plasma system, and is mainly realized by the following two ways: firstly, a catalyst is arranged inside a discharge area (III-Plasma Catalysis, IPC); ② catalyst is placed at the back of the discharge zone (Post Plasma Catalysis, PPC).
The traditional air purifier containing air filter screen mainly plays a role of filtering particulate matters, and the plasma technology (effective for various volatile air pollutants, which are oxidized or reduced with pollutant molecules in the air to generate inorganic small molecule compounds with low toxicity) is gradually adopted in the market, for example: the plasma technique is used to treat, for example, tabletops containing paint or coatings, with the main function of decomposing formaldehyde. The common formaldehyde treatment technologies are mostly catalytic decomposition technologies, and are limited by the types of catalysts, the shapes of the catalysts in a processor and the stimulation of external energy, and the two types of air purification modules in the field cannot be integrated into a treatment module with a simple structure.
Disclosure of Invention
The invention aims to solve the technical problem that a particulate matter filtering module and a formaldehyde removing module cannot be integrated into a processing module with a simple structure in the conventional air purifier, and provides a formaldehyde removing device and a preparation method thereof. The formaldehyde removing device disclosed by the invention integrates a formaldehyde catalytic degradation technology and a particulate matter removing technology into a processing module with a unified structure, has an obvious effect, and has the advantages of simple structure, strong practicability, safety, no pollution and high efficiency.
The inventor of the present invention has tried to overcome the restriction of the traditional thinking that the catalyst is generally in the form of particles, has creatively arranged the catalyst on the air purification filter screen in the form of coating, and has found in the process of development that, because the main function of the air purification filter screen is to filter the particles, the mesh openings are very small, even if the air purification filter screen is arranged on the surface of the filter screen in the form of coating, the mesh openings are partially or completely blocked by carelessness, so the inventor has done a great deal of labor in groping the test parameters and adjusting the spraying process.
The invention provides a formaldehyde removing device, which comprises an air purification filter screen and a plasma generating device which are coaxially arranged, wherein the plasma generating device and the air purification filter screen are respectively close to an air inlet and an air outlet, a nano zinc oxide graphene coating is uniformly arranged on the surface of the air purification filter screen, the thickness of the nano zinc oxide graphene coating is 0.3-1.5 mm, the nano zinc oxide graphene coating comprises nano zinc oxide and graphene, and the mass ratio of the nano zinc oxide graphene coating to the nano graphene is (50-300): (1-3).
In the research and development process of the invention, the inventor finds that the thickness of the nano zinc oxide graphene coating is a parameter which is difficult to control, and the thickness is too small, so that the catalyst content is low, and the function of removing organic waste gas exerted after plasma excitation is very limited; too large a thickness will result in a significant reduction in porosity and, in the worst case, a complete blockage of the screen openings. In addition, a great technical difficulty is that the ratio of zinc oxide to graphene is determined, and if the ratio is determined to be inappropriate, the catalytic degradation effect is not obvious, or the fluid performance is poor, so that the spraying difficulty is high or the binding force is not enough.
In the invention, the thickness of the nano zinc oxide graphene coating is preferably 0.5-1.0 mm, for example 0.6 mm.
In the present invention, the ratio of the mass of the nano zinc oxide to the mass of the graphene in the nano zinc oxide graphene coating is preferably 300: (1-3), more preferably 300: 1.875.
in the invention, preferably, the nano zinc oxide graphene coating is obtained by spraying a nano zinc oxide graphene coating on the surface of the air purification filter screen and then curing.
In the present invention, the discharge voltage of the plasma generation device is preferably 6000-8000V. When the voltage is kept within the range, the formaldehyde removal rate can be ensured, and the high-voltage static electricity can be controlled to generate ozone.
In the present invention, the formaldehyde removing device preferably includes an infrared tube heating device, a composite filter screen collecting device and the plasma generating device, which are sequentially disposed, and the air purifying filter screen is disposed in the composite filter screen collecting device.
The infrared tube heating device has a conventional structure in the field, and preferably comprises a device frame body, a heating power supply and an infrared heating tube, wherein the infrared heating tube is fixed on the device frame body, and the heating power supply is fixed on the device frame body. The infrared tube heating device is used for further promoting the formaldehyde catalytic reaction by increasing the temperature.
The composite filter screen collecting device has a conventional structure in the field, and preferably further comprises a filter screen frame body and a conductive copper sheet; the filter screen frame body comprises an upper cover and a base which are connected through a buckle, the air purification filter screen is arranged between the upper cover and the base, and the conductive copper sheets are arranged in a clamping groove preset in the filter screen frame body.
The plasma generating device is provided with a conventional structure in the field, and preferably comprises a gate electrode, a high-voltage bag, a plurality of negative ion needles, a conductive copper sheet and a negative ion generating frame, wherein the high-voltage bag is fixed on the negative ion generating frame, the negative ion needles are respectively welded to the conductive copper wire, the conductive copper wire welded with the negative ion needles is placed in a groove of the negative ion generating frame, the gate electrode is fixed on the negative ion generating frame through glue filling, and the conductive copper sheet is placed in a clamping groove preset by the negative ion generating frame.
Preferably, the infrared tube heating device, the composite filter screen collecting device and the plasma generating device are horizontally or vertically arranged and located on the same reference line; more preferably, the composite filter screen collecting device is used as a reference, the distance between the plasma generating device and the composite filter screen collecting device is 2-3 cm, and the distance between the infrared tube heating device and the composite filter screen collecting device is 3-4 cm. The three can be fixed in the whole machine air duct and are suitable for purifiers of different types as components.
The formaldehyde removing device is also a group of air filters as a whole, the main function of the air filters is used for filtering particles in air, and the functional coating-nano zinc oxide graphene coating is sprayed on the surface of the filter screen of the air filters, so that on one hand, the coating carries a catalyst for removing formaldehyde, on the other hand, plasma promotes catalytic reaction, therefore, the whole set of filter device is added with the effect of removing formaldehyde.
That is to say, the formaldehyde removal device of the invention not only can remove particles through the air purification filter screen, but also takes the nano zinc oxide graphene coating on the air purification filter screen as a catalyst layer, and plays a role in degrading organic waste gas through plasma excitation. The principle of treating the organic waste gas in the air by the synergistic effect of the low-temperature plasma and the catalysis is as follows: ions, high-energy electrons, excited atoms, molecules and free radicals contained in the plasma are high-activity substances, and can accelerate degradation reaction which is difficult to perform or has a slow speed under common conditions, so that the degradation effect of pollutants is improved. Meanwhile, when active ions and free radical gas are discharged, some high-energy excited particles jump downwards to generate ultraviolet light, and when the energy of photons or electrons is greater than the forbidden bandwidth of a semiconductor, electrons in the semiconductor catalyst can be excited, so that the electrons jump from a valence band to a conduction band, electron hole pairs with strong activity are formed, and a series of redox reactions are induced to be carried out. The photogenerated holes have strong electron capturing capacity and can form hydroxyl radicals on the surface of the catalyst, so that pollutants are further oxidized. In addition, the catalyst can selectively react with intermediate by-products generated by the plasma to obtain desired degradation productsMass (e.g. CO)2And H2O)。
The invention also provides a preparation method of the formaldehyde removal device, which comprises the following steps:
(1) spraying the nano zinc oxide graphene coating on the surface of the air purification filter screen, and then curing;
(2) arranging the plasma generating device at the front end of the air purification filter screen;
in the step (1), the preparation method of the nano zinc oxide graphene coating comprises the following steps: and (3) uniformly dispersing the dispersion liquid of the nano zinc oxide and the aqueous dispersion liquid of the graphene at the temperature of not more than 35 ℃.
In the invention, the dispersion liquid of nano zinc oxide is a conventional term in the field and is generally prepared by the following method: mixing nano zinc oxide and a solvent uniformly to obtain the zinc oxide-zinc composite material; the solvent is ethanol and/or water. Wherein, the ethanol can be selected from laboratory common analytical purity, and the purity is more than 99.7%. The nano zinc oxide is a conventional substance in the field, and the particle size is between 1 and 100 nm. The concentration of the nano zinc oxide in the nano zinc oxide solution is preferably 0.05-0.3 g/ml, and the percentage is mass percent.
In the present invention, the aqueous dispersion of graphene is a general term in the art, and is obtained by uniformly dispersing graphene in water. In the present invention, the concentration of graphene in the aqueous dispersion of graphene is preferably 2.5%, and the percentage is mass%. In a preferred embodiment of the present application, the aqueous dispersion of graphene is a graphene slurry obtained from Ningbo ink science and technology Co., Ltd, wherein the graphene content is 2.5 wt%.
In the invention, the uniform dispersion is preferably carried out in an ultrasonic cleaner with the water temperature lower than 35 ℃, the lower limit value of the temperature can be the lower limit value of the conventional room temperature condition, such as 5 ℃, so the uniform dispersion temperature can be preferably the conventional room temperature condition, such as 10-25 ℃. Multiple tests and groping results show that when the water temperature is too high and exceeds 35 ℃, the solvent in the dispersion liquid can volatilize, the concentration of the dispersion liquid is changed, and a spray gun head can be blocked in the process of technological spraying, so that spraying cannot be directly caused; in addition, the temperature is too high, the stirring dispersion process can form flocculation on the upper layer surface of the liquid wall, the lower layer surface concentration is low, and the whole mixing is not uniform.
According to a preferred embodiment of the present application, the preparation method of the nano zinc oxide graphene coating comprises the following steps:
firstly, 1.25-7.5 g of nano-scale zinc oxide powder is put into 25ml of ethanol solution and is uniformly mixed by ultrasound for later use;
secondly, 1.875g of graphene aqueous dispersion (the content of graphene is 2.5 wt%) is taken, then the graphene aqueous dispersion is mixed with the solution obtained in the first step, the mixture is placed in an ultrasonic cleaner to vibrate for 3-5 hours, the mixture is taken out every 30min and vibrated for 20S up and down, then cold water is used for replacing water in the ultrasonic cleaner, the water temperature in the ultrasonic cleaner is kept to be lower than 35 ℃, and the mixture is taken out after the ultrasonic treatment is finished.
During the development of the present invention, the inventors also tried to prepare coatings by other means than spraying (e.g., painting and dipping), but all failed. The result shows that the coating formed by the nano zinc oxide graphene coating acts on the surface of the air purification filter screen (namely on the surface of the filter screen support body, the material of the filter screen support body is generally a PET layer), and the PET layer can be damaged by adopting a dipping mode; in addition, the coating is too thick in a coating mode, so that the filter pores of the filter screen support body are blocked, and the wind resistance is increased.
In step (1), the spraying method preferably includes the following steps: spraying the nano zinc oxide graphene coating on the surface of the air purification filter screen in a spraying manner, wherein the distance between a spray gun and the surface of the air purification filter screen is 30-50cm, and the spraying amount is (10-20) ml/m2。
In a preferred embodiment of the present application, the spray gun is 35cm away from the surface of the air purification filter screen, and the spraying amount is 15ml/m2。
In the invention, the solid content of the nano zinc oxide graphene coating is preferably 6.2-25.9%.
In the step (1), the curing is a conventional operation in the field, preferably drying by hot air; the temperature of the hot air drying is conventional in the art, and is preferably 60-90 ℃, for example, in a preferred embodiment of the present application, the drying is drying by using a hot air blower, and the temperature is 80 ℃.
In the preparation method, the installation connection among the infrared tube heating device, the composite filter screen collecting device and the plasma generating device and the installation of the air purification filter screen in the composite filter screen collecting device can be finished according to the description of the structure in the invention content.
According to the invention, the graphene is used as a catalyst carrier, the coating of the nano zinc oxide catalyst is added, the coating is uniformly sprayed on the surface of the air purification filter screen, the plasma emission head is arranged at the front end of the prepared filter screen, and the removal of formaldehyde in polluted air is promoted by the matching use of plasma and the filter screen.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
the catalyst with the formaldehyde removing function is prepared into a solution and compounded on the air purification filter screen, and the solution is matched with the plasma for use, so that the filter screen has the capability of efficiently removing formaldehyde;
the invention combines a physical and chemical method to remove formaldehyde, has low cost, obvious effect, no peculiar smell and no secondary pollution.
Drawings
Fig. 1 is a schematic perspective view of a formaldehyde removal device in example 1.
Fig. 2 is a schematic perspective view showing the explosion structure of the formaldehyde removing apparatus in example 1.
Fig. 3 is a schematic perspective view of the gate electrode in example 1.
Fig. 4 is a schematic perspective view of an infrared tube heating apparatus according to example 1.
Fig. 5 is a schematic perspective view of an air purification filter in example 1.
Fig. 6 is a schematic perspective view of a plasma generator according to embodiment 1.
Fig. 7 is a schematic structural view of an end of the plasma generating apparatus near the air inlet in embodiment 1.
In fig. 1 to 7, the respective reference numerals are explained as follows:
infrared tube heating device 1
Composite filter screen collecting device 2
Air cleaning filter screen 202
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
In the following examples, the aqueous dispersion of graphene was a graphene slurry obtained from Ningbo ink science and technology Co., Ltd, in which the graphene content was 2.5 wt%; the ethanol is selected from laboratory common analytical purity, and the purity is more than 99.7%.
Example 1
1. Preparation of nano zinc oxide graphene coating
Putting 7.5g of nano zinc oxide powder into 25mL of ethanol solution, and uniformly mixing by ultrasonic waves for later use. Secondly, adding 1.875g of graphene slurry with the graphene content of 2.5% into the solution, placing the solution in an ultrasonic cleaner, vibrating the solution for 5 hours, taking the solution out every 30min, vibrating the solution up and down for 20s, replacing water in the ultrasonic cleaner with cold water, and keeping the water temperature in the ultrasonic cleaner below 35 ℃. And taking out after the ultrasonic treatment is finished.
2. Preparing air purifying filter screen
Spraying the coating in the step 1 onto the surface of an air purification filter screen in a spraying mode, wherein the distance between a spray gun and the surface of the filter screen is 35cm, and the spraying amount is 15ml/m2. And after the surface of the filter screen is sprayed, drying the filter screen by using a hot air blower at a drying temperature of 80 ℃ for later use. The thickness of the formed nano zinc oxide graphene coating is 0.6mm, and the mass ratio of the nano zinc oxide to the graphene in the coating is 300: 1.875.
3. preparation formaldehyde remove device
The formaldehyde removing device provided by the embodiment comprises an infrared tube heating device 1, a composite filter screen collecting device 2 and a plasma generating device 3 which are sequentially arranged, wherein the composite filter screen collecting device 2 comprises an air purifying filter screen 202 as shown in fig. 1-7.
The infrared tube heating device 1 includes a device frame 101, a heating power supply 102, and an infrared heating tube 103, wherein the infrared heating tube 103 is fixed to the device frame 101 by gluing, and the heating power supply 102 is fixed to the device frame 101 by screws.
The composite filter screen collecting device 2 further comprises a filter screen frame body 201 and a conductive copper sheet; the filter screen frame body 201 comprises an upper cover and a base which are connected through a buckle, the air purification filter screen 202 is arranged between the upper cover and the base, and the conductive copper sheets are arranged in a clamping groove preset in the filter screen frame body 201.
The plasma generating device 3 comprises a gate electrode 301, a high-voltage pack 302, a plurality of negative ion needles 303, a conductive copper sheet 304 and a negative ion generating frame 305, the high-voltage pack 302 is fixed on the negative ion generating frame 305 through screws, the negative ion needles 303 are respectively welded to the conductive copper wires, the conductive copper wires welded with the negative ion needles are placed in grooves of the negative ion generating frame 305, the top is fixed through glue filling, the gate electrode 301 is pre-fixed on the negative ion generating frame 305 through screws, and the conductive copper sheet 304 is placed in a clamping groove pre-arranged on the negative ion generating frame 305.
The infrared tube heating device 1, the composite filter screen collecting device 2 and the plasma generating device 3 are horizontally or vertically arranged and located on the same datum line, the composite filter screen collecting device 2 is used as a datum, the distance between the plasma generating device 3 and the composite filter screen collecting device 2 is 2-3 cm, the distance between the infrared tube heating device 1 and the composite filter screen collecting device 2 is 3-4 cm, and the three can be fixed in an air duct of the whole machine and are suitable for purifiers of different types as components. The discharge voltage of the plasma generation device 3 is 6000-8000V.
Effect example 1
The formaldehyde removing apparatus of example 1 was tested for its formaldehyde removing effect, and the results are shown in Table 1.
In the samples in table 1, the simple plasma means that only the plasma generator 3 and the infrared tube heater 1 are provided in addition to the example 1, and the composite screen collector 2 is not included.
In this test, the apparatus size of example 1 and the "plasma only" sample used for testing the formaldehyde removing effect was 20X 20cm, and the test air speed was 3.0 m/s.
Table 1 effects test data for example 1
Claims (15)
1. The utility model provides a formaldehyde remove device, its characterized in that, its air purification filter screen and a plasma generating device including coaxial setting, plasma generating device air purification filter screen is close to air intake, air outlet respectively, the surface of air purification filter screen evenly is equipped with a nanometer zinc oxide graphene coating, the thickness of nanometer zinc oxide graphene coating is 0.3 ~1.5mm, nanometer zinc oxide graphene coating includes nanometer zinc oxide and graphite alkene, and the ratio of both qualities is (50 ~ 300): (1-3).
2. The formaldehyde removal device of claim 1, wherein the nano zinc oxide graphene coating has a thickness of 0.5 to 1.0 mm.
3. The formaldehyde removal device of claim 2, wherein the nano zinc oxide graphene coating has a thickness of 0.6 mm.
4. The formaldehyde removal device of claim 1, wherein the nano-zinc oxide graphene coating has a mass ratio of nano-zinc oxide to graphene of 300: (1-3).
5. The formaldehyde removal device of claim 4, wherein the nano-zinc oxide graphene coating has a mass ratio of nano-zinc oxide to graphene of 300: 1.875.
6. the formaldehyde removal device of claim 1, wherein the nano zinc oxide graphene coating is obtained by spraying a nano zinc oxide graphene coating on the surface of the air purification filter screen and then curing;
and/or the discharge voltage of the plasma generation device is 6000-8000V.
7. The formaldehyde removing device according to claim 1, wherein the formaldehyde removing device comprises an infrared tube heating device, a composite filter screen collecting device and the plasma generating device, which are sequentially arranged, and the air purifying filter screen is arranged in the composite filter screen collecting device.
8. The formaldehyde removal device of claim 7, wherein the composite screen collection device further comprises a screen frame and a conductive copper sheet; the filter screen frame body comprises an upper cover and a base which are connected through a buckle, the air purification filter screen is arranged between the upper cover and the base, and the conductive copper sheet is arranged in a clamping groove preset in the filter screen frame body;
and/or the infrared tube heating device, the composite filter screen collecting device and the plasma generating device are horizontally or vertically arranged; the distance between the plasma generating device and the composite filter screen collecting device is 2-3 cm, and the distance between the infrared tube heating device and the composite filter screen collecting device is 3-4 cm.
9. A method for manufacturing the formaldehyde removing device according to any one of claims 1 to 8, comprising the steps of:
(1) spraying the nano zinc oxide graphene coating on the surface of the air purification filter screen, and then curing;
(2) arranging the plasma generating device at the front end of the air purification filter screen;
in the step (1), the preparation method of the nano zinc oxide graphene coating comprises the following steps: and (3) uniformly dispersing the dispersion liquid of the nano zinc oxide and the aqueous dispersion liquid of the graphene at the temperature of not more than 35 ℃.
10. The method according to claim 9, wherein the method for preparing the nano zinc oxide dispersion comprises the following steps: mixing nano zinc oxide and a solvent uniformly to obtain the zinc oxide-zinc composite material; the solvent is ethanol and/or water;
and/or the graphene water dispersion liquid is obtained by uniformly dispersing graphene in water;
and/or, the dispersion is carried out at 10-25 ℃.
11. The preparation method according to claim 10, wherein the concentration of the nano zinc oxide in the nano zinc oxide dispersion is 0.05 to 0.3 g/ml;
and/or the concentration of the graphene in the graphene water dispersion liquid is 2.5 percent, and the percentage is mass percent.
12. The method of claim 9, wherein in the step (1), the spray gun is 30-50cm away from the surface of the air purification filter screen during the spraying, and the spraying amount is 10-20ml/m2。
13. The method of claim 12, wherein the lance is spaced from the air gapThe surface of the chemical filter screen is 35cm, and the spraying amount is 15ml/m2。
14. The method according to claim 9, wherein in the step (1), the curing is carried out by hot air drying; the temperature for drying by hot air is 60-90 ℃.
15. The method of claim 14, wherein the hot air drying temperature is 80 ℃.
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| CN204063337U (en) * | 2014-09-05 | 2014-12-31 | 上海载源新材料科技有限公司 | Based on LED light source and the synergistic air purifier of nano-contact matchmaker |
| CN105854414A (en) * | 2016-03-31 | 2016-08-17 | 上海市凌桥环保设备厂有限公司 | Composite filter material for air purifier and a preparation method thereof |
| CN107687677A (en) * | 2017-09-22 | 2018-02-13 | 清华大学 | Air-purifying piece and air cleaner modules |
| CN108826529A (en) * | 2018-05-03 | 2018-11-16 | 宁波蓝晟环保科技有限公司 | A kind of method of room air pollution prevention and treatment |
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| TW200927988A (en) * | 2007-12-19 | 2009-07-01 | Ind Tech Res Inst | Method for manufacturing high performance photocatalytic filter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204063337U (en) * | 2014-09-05 | 2014-12-31 | 上海载源新材料科技有限公司 | Based on LED light source and the synergistic air purifier of nano-contact matchmaker |
| CN105854414A (en) * | 2016-03-31 | 2016-08-17 | 上海市凌桥环保设备厂有限公司 | Composite filter material for air purifier and a preparation method thereof |
| CN107687677A (en) * | 2017-09-22 | 2018-02-13 | 清华大学 | Air-purifying piece and air cleaner modules |
| CN108826529A (en) * | 2018-05-03 | 2018-11-16 | 宁波蓝晟环保科技有限公司 | A kind of method of room air pollution prevention and treatment |
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