CN115155306A - Efficient remover for indoor formaldehyde and organic volatile matters, and preparation method and application thereof - Google Patents
Efficient remover for indoor formaldehyde and organic volatile matters, and preparation method and application thereof Download PDFInfo
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- CN115155306A CN115155306A CN202210794164.0A CN202210794164A CN115155306A CN 115155306 A CN115155306 A CN 115155306A CN 202210794164 A CN202210794164 A CN 202210794164A CN 115155306 A CN115155306 A CN 115155306A
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- nano silicon
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- silver bromide
- remover
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 229920001661 Chitosan Polymers 0.000 claims abstract description 91
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 73
- 238000000034 method Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- QFTLTYBDMFRHQI-UHFFFAOYSA-M [Br-].[Ag].[Ag+] Chemical compound [Br-].[Ag].[Ag+] QFTLTYBDMFRHQI-UHFFFAOYSA-M 0.000 claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 30
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- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims abstract description 23
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- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 claims description 38
- 238000000502 dialysis Methods 0.000 claims description 33
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- 239000010703 silicon Substances 0.000 claims description 28
- WLNARFZDISHUGS-MIXBDBMTSA-N cholesteryl hemisuccinate Chemical compound C1C=C2C[C@@H](OC(=O)CCC(O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 WLNARFZDISHUGS-MIXBDBMTSA-N 0.000 claims description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 24
- 239000004005 microsphere Substances 0.000 claims description 24
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 20
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- 238000005260 corrosion Methods 0.000 claims description 20
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 20
- 235000012000 cholesterol Nutrition 0.000 claims description 19
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 18
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 claims description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
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- LMDZBCPBFSXMTL-UHFFFAOYSA-N 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide Substances CCN=C=NCCCN(C)C LMDZBCPBFSXMTL-UHFFFAOYSA-N 0.000 claims description 8
- FPQQSJJWHUJYPU-UHFFFAOYSA-N 3-(dimethylamino)propyliminomethylidene-ethylazanium;chloride Chemical compound Cl.CCN=C=NCCCN(C)C FPQQSJJWHUJYPU-UHFFFAOYSA-N 0.000 claims description 8
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- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 8
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- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 claims description 5
- 229940082004 sodium laurate Drugs 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 4
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 3
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- -1 formaldehyde, benzene series Chemical class 0.000 description 11
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
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- 238000003905 indoor air pollution Methods 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
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- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
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- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention relates to the technical field of environmental protection, in particular to a high-efficiency remover for indoor formaldehyde and organic volatile matters, a preparation method and application thereof, wherein the remover comprises a modified chitosan catalyst, silver bromide-silver/nano silicon, hydrogel, a wetting agent, a defoaming agent and the balance of water; the modified chitosan catalyst is prepared by carrying molybdate on modified chitosan; the silver bromide-silver/nano silicon is prepared by attaching silver bromide to a nano silicon wafer. The invention can play excellent roles of decomposing formaldehyde and removing peculiar smell molecules under visible light, not only can reduce the formaldehyde release of the base material, but also can purify and decompose formaldehyde and peculiar smell molecules in the air, can maintain effectiveness for a long time and can continuously purify indoor air; in addition, the self-cleaning agent has a strong self-cleaning effect on the surface of the base material, so that the surface of the base material is not easily polluted, and the service life of the base material is prolonged; the raw materials are nontoxic and have no side effect, and the method is safe and environment-friendly.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a high-efficiency remover for indoor formaldehyde and organic volatile matters, and a preparation method and application thereof.
Background
In recent years, with the rapid development of economy in China and the continuous improvement of the modernization level of industry and agriculture, the living standard of people is improved to a great extent, particularly in the aspect of living conditions, the living area of people is greatly increased, and indoor decoration is more and more studied. However, people living indoors for a long time have various discomfortable symptoms such as headache, cough, tiredness and the like, and even serious people have various diseases, and researches show that the discomfortable symptoms are quite related to indoor air pollution. Many places have indoor air concentrations 2-5 times higher than outdoors, and urban populations spend approximately 90% of their time indoors each day. Therefore, it is a focus of public attention to attach importance to indoor air quality, prevent indoor air pollution, and detect and control indoor air pollution.
Formaldehyde is one of the main indoor pollutants, and mainly comes from coating solvents, adhesives of plywood and surfaces of some fabrics. At present, the main treatment methods for indoor decoration pollution include a physical adsorption method, a chemical reaction method, a catalytic oxidation method, a biological method, a composite method and a cold plasma method. The adsorption method is the most commonly applied method due to low price and easily available raw materials, but the adsorption method such as carbon adsorption is only ideal for recovering volatile organic gases with low concentration, carbon dioxide, sulfur dioxide and the like, and has almost no purification effect on some chemical releases generated in decoration. In comprehensive comparison, the catalytic oxidation method is a new method for purifying air with wider prospect. The photocatalyst is a general name of a photo-semiconductor material with a photocatalytic function represented by nano-scale titanium dioxide, is coated on the surface of a base material, and can effectively degrade toxic and harmful gases in the air under the action of ultraviolet light and visible light, but the existing photocatalyst still has the problems of single type of degradation pollutants, poor catalytic degradation performance under the action of the visible light, limitation of chemical pollution in a short time, incapability of effectively removing formaldehyde hidden in furniture and the like.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the invention provides the efficient remover which has good stability, can maintain and decompose and purify pollutants such as formaldehyde, organic volatile matters and the like for a long time and can continuously purify the indoor environment, the preparation method and the application.
On one hand, the invention provides a high-efficiency remover for indoor formaldehyde and organic volatile matters, and the key points are as follows: comprises the following components in parts by weight: 12-18 parts of modified chitosan catalyst, 8-15 parts of silver bromide-silver/nano silicon, 20-25 parts of hydrogel, 1-3 parts of wetting agent, 0.5-2 parts of defoaming agent and the balance of water;
the modified chitosan catalyst is prepared by carrying molybdate on modified chitosan;
the silver bromide-silver/nano silicon is prepared by attaching silver bromide to a nano silicon wafer. The modified chitosan catalyst and the silver bromide-silver/nano-silicon in the scheme have adsorption and visible light catalytic degradation performances, so that the modified chitosan catalyst and the silver bromide-silver/nano-silicon can absorb and decompose indoor formaldehyde, purify and decompose other gas pollutants in indoor air, and have high visible light degradation performance.
Preferably, the modified chitosan catalyst is prepared by the following method: adding 0.5-1.2 wt% molybdenum salt aqueous solution and 70-80% ethanol into modified chitosan, heating to 75-85 deg.C, reacting for 2-3 hr, filtering, and drying. The ammonium molybdate solution in this embodiment preferably has a concentration of 0.8-1.1% wt, the modified chitosan preferably has an amine content of greater than 11% wt, and the resulting modified chitosan catalyst has a molybdate immobilization rate of up to 90% or greater.
Preferably, the modified chitosan is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1: (2-3); reacting at 80-90 deg.C for 20-28h, washing, filtering, drying, adding acetone, dissolving, and crystallizing to obtain cholesterol hemisuccinate; placing the chitosan microspheres in water for swelling, and then sequentially adding absolute ethyl alcohol, a coupling agent and an ethanol solution of cholesterol hemisuccinate, wherein the molar ratio of the chitosan microspheres to the cholesterol hemisuccinate is 1: (0.2-0.35), after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing by a dialysis medium, filtering the dialysate, and freeze-drying to obtain the product. According to the scheme, the chitosan is subjected to physical and chemical double modification to obtain the spherical cholesterol hydrophobic modified chitosan with excellent performance, and the spherical cholesterol hydrophobic modified chitosan has the advantages of no toxicity, biodegradability, developed microporous structure, large specific surface area, no loss of an acid environment, large adsorption capacity and high adsorption speed.
Preferably, the dialysis process is: ethanol solutions with different concentrations are used as dialysis media and distilled water for dialysis for 2-3d respectively, and the dialysis media are replaced every 4-5 h. In this embodiment, the concentration of the ethanol solution is not more than 90% by weight, and the dialysis is performed with a gradient of the ethanol solution concentration from high to low in order, the fat-soluble substances whose reaction is not completed may be treated.
Preferably, the dialysis medium is 85% ethanol solution, 75% ethanol solution, 65% ethanol solution, 55% ethanol solution. In the scheme, the 85% ethanol solution can not only remove fat-soluble substances (such as cholesterol hemisuccinate and N-hydroxysuccinimide) which are not completely reacted, but also avoid influencing the performance of the cholesterol hydrophobic modified chitosan, and the ethanol solution with other concentration can be subjected to gradient dialysis to remove other reaction substances.
Preferably, the coupling agent is a mixture of 1: 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide of (1.5-2).
Preferably, the chitosan microsphere is prepared by the following method: dissolving chitosan powder in acetic acid solution with mass fraction of 1-5%. The scheme can physically modify chitosan into a microsphere structure with good mechanical strength, and realize rapid and uniform adsorption.
Preferably, the silver bromide-silver/nano silicon catalyst is prepared by the following method: dispersing nano silicon in deionized water to form 1-3% nano silicon suspension, adding silver nitrate solution while stirring, adjusting pH to 7-9, stirring for 4-7h in dark environment, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1-3% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying. In the scheme, the molar mass ratio of the silver nitrate to the nano silicon is preferably (1-3) mol:1g, the prepared silver bromide-silver/nano silicon catalyst has high quantity of generated electrons and holes, and meanwhile, the nano silicon increases the dispersibility of silver bromide, avoids particle agglomeration and improves the photocatalytic activity.
Preferably, the nano silicon is prepared by the following method: a silicon nano-pore array is formed by taking a monocrystalline silicon wafer as a base material and adopting a hydrothermal corrosion method, the pore diameter on a silicon column is gradually reduced from 40 +/-5 nm at the top of the column to 15 +/-5 nm at the bottom of the column, the size range of the silicon column is 1.9-4.5nm, and the thickness of a pore array area is 2-20 mu m. The band gap energy of the monocrystalline silicon of the nano silicon prepared by the scheme is widened due to the existence of the silicon nano column, and the specific surface area of the regular array structure and the special nano porous structure is greatly increased.
Preferably, the hydrothermal etching solution is a mixed aqueous solution of hydrofluoric acid and ferric nitrate, wherein the concentration of the hydrofluoric acid is 12-15mol/L, and the concentration of the ferric nitrate is 0.04-0.07mol/L.
Preferably, the hydrogel is one or a mixture of more than two of sodium laurate hydrogel, sodium alginate hydrogel, polyvinyl alcohol hydrogel, polyacrylamide hydrogel, agar hydrogel and polyethylene glycol hydrogel. The gel has the characteristic of thermal reversible phase transition to form a three-dimensional fiber grid structure, so that nanoparticles are effectively prevented from being aggregated and precipitated, the surface hydrophilicity of a base material can be increased, and the self-cleaning capability is favorably improved.
On the other hand, the invention provides a preparation method of the efficient remover for indoor formaldehyde and organic volatile matters, which is characterized by comprising the following steps: heating and dissolving the hydrogel to be transparent, adding a wetting agent and a defoaming agent, and dispersing at medium speed for 20-40min; then adding a modified chitosan catalyst and silver bromide-silver/nano silicon, and dispersing at a high speed for 30-40min; adding water to adjust viscosity.
In another aspect, the present invention provides the use of a high efficiency scavenger for indoor air purification. In practical application, the air purification includes the purification of toxic gases, such as formaldehyde, benzene series, ammonia gas, total volatile organic compounds, sulfur dioxide, carbon monoxide and other toxic gases; and odor adsorption, such as indoor smoke odor, toilet odor, garbage odor, animal odor, etc.
Preferably, the high efficiency remover is coated on the surface of the substrate by brushing, rolling, dipping or spraying.
Has the beneficial effects that: compared with the prior art, the invention can play excellent roles of decomposing formaldehyde and removing peculiar smell molecules under visible light, not only can reduce the formaldehyde release of the base material, but also can purify and decompose formaldehyde and peculiar smell molecules in the air, can be effectively maintained for a longer time and can continuously purify the indoor air; in addition, the self-cleaning agent has a strong self-cleaning effect on the surface of the base material, so that the surface of the base material is not easily polluted, and the service life of the base material is prolonged; the raw materials are nontoxic and have no side effect, and the method is safe and environment-friendly.
Drawings
FIGS. 1a and 1b show field emission scanning electron microscope (FE-SEM) micrographs of nano-silicon and silver-silver bromide/nano-silicon;
fig. 2 shows a Transmission Electron Microscope (TEM) photograph of the modified chitosan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments. It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme of the present invention are shown in the specific embodiments, and other details not closely related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1 high efficiency remover
Comprises the following components in parts by weight: 12 parts of modified chitosan catalyst, 8 parts of silver bromide-silver/nano silicon, 20 parts of sodium laurate hydrogel, 1 part of polyether-dimethyl siloxane graft copolymer, 0.5 part of modified polydimethylsiloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:2; reacting at 80 ℃ for 20h, washing, filtering and drying the reactant, adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in acetic acid solution with mass fraction of 1%; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol, wherein the mass ratio of the absolute ethyl alcohol to the chitosan microspheres is 1:1.5 ethanol solution of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, cholesterol hemisuccinate, chitosan microspheres and cholesterol hemisuccinate in a molar ratio of 1:0.2, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 0.5 wt% molybdenum salt aqueous solution and 70% ethanol into the modified chitosan, heating to 75-85 deg.C, reacting for 2-3h, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 12mol/L, the concentration of ferric nitrate is 0.04mol/L, and the corrosion is carried out for 5min at 70 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 1.9-2.5nm, the distance between the two adjacent walls of the hole is 3-8 mu m, and the thickness of the hole array area is 15-20 mu m; dispersing nano silicon in deionized water to form 1% nano silicon suspension, adding silver nitrate solution while stirring, adjusting pH to 7, stirring for 4-7h in dark environment, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
The preparation method comprises the following steps: heating the sodium laurate hydrogel with the formula amount at 50-60 ℃, stirring for dissolving, when the mixed solution is transparent, adding the polyether and dimethyl siloxane graft copolymer and the modified polydimethylsiloxane in sequence at a stirring speed of 3500 rpm, and stirring for 20-40min; the stirring speed is increased to 5500 revolutions per minute, the modified chitosan catalyst and the silver bromide-silver/nano silicon are sequentially added, and the dispersion is carried out for 30-40min; slowly injecting the aqueous solution along the wall of the container to adjust the viscosity, continuously stirring at 2000 rpm, gradually cooling, stirring for 60 minutes, and cooling to room temperature to prepare a finished product.
Example 2
Comprises the following components in parts by weight: 18 parts of modified chitosan catalyst, 15 parts of silver bromide-silver/nano silicon, 25 parts of sodium alginate hydrogel, 3 parts of polyether-dimethyl siloxane graft copolymer, 2 parts of modified polydimethylsiloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:3; reacting for 28 hours at 90 ℃, washing, filtering and drying reactants, and adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in an acetic acid solution with the mass fraction of 5 percent by weight, then injecting the chitosan solution into a NaOH alcohol solution with the mass fraction of 10 percent by weight to obtain hollow spheres, and washing and freeze-drying the hollow spheres to obtain the chitosan microspheres; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol in a mass ratio of 1:2, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide, and cholesterol hemisuccinate in an ethanol solution, wherein the molar ratio of the chitosan microspheres to the cholesterol hemisuccinate is 1:0.35, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 1.2 wt% molybdenum salt aqueous solution and 80% ethanol into modified chitosan, heating to 75-85 deg.C, reacting for 2-3 hr, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 12mol/L, the concentration of ferric nitrate is 0.04mol/L, and the corrosion is carried out for 5min at 70 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 1.9-2.5nm, the distance between the two adjacent walls of the hole is 3-8 mu m, and the thickness of the hole array area is 15-20 mu m; dispersing nano silicon in deionized water to form 1% nano silicon suspension, adding silver nitrate solution while stirring, adjusting pH to 7, stirring for 4-7h in dark environment, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
The preparation method is the same as that of example 1.
Example 3
Comprises the following components in parts by weight: 15 parts of modified chitosan catalyst, 10 parts of silver bromide-silver/nano silicon, 22 parts of polyvinyl alcohol hydrogel, 1.5 parts of polyether and dimethyl siloxane graft copolymer, 1 part of modified dimethyl siloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:2.6; reacting at 80-90 ℃ for 20-28h, washing, filtering and drying the reactant, and adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in 3.5 wt% acetic acid solution, adding chitosan solution into 8 wt% NaOH alcohol solution to obtain hollow spheres, washing, and freeze drying to obtain chitosan microspheres; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol in a mass ratio of 1:1.8 ethanol solution of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and cholesterol hemisuccinate, the molar ratio of chitosan microspheres to cholesterol hemisuccinate is 1:0.28, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 1.0 wt% molybdenum salt water solution and 75% ethanol into modified chitosan, heating to 75-85 deg.C, reacting for 2-3 hr, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 12mol/L, the concentration of ferric nitrate is 0.04mol/L, and the corrosion is carried out for 5min at 70 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 1.9-2.5nm, the distance between the two adjacent walls of the hole is 3-8 mu m, and the thickness of the hole array area is 15-20 mu m; dispersing nano silicon in deionized water to form a 1% nano silicon suspension, stirring and adding a silver nitrate solution, adjusting the pH value to 7, stirring for 4-7h in a dark environment, performing centrifugal separation, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
The preparation method is the same as that of example 1.
Example 4
Comprises the following components in parts by weight: 18 parts of modified chitosan catalyst, 8 parts of silver bromide-silver/nano silicon, 22 parts of polyacrylamide hydrogel, 2 parts of polyether-dimethyl siloxane graft copolymer, 1.5 parts of modified polydimethylsiloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:2.5; reacting for 24h at the temperature of 80 ℃, washing, filtering and drying reactants, adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in acetic acid solution with mass fraction of 4.5 percent by weight, then injecting the chitosan solution into NaOH alcohol solution with 6 percent by weight to obtain hollow spheres, and washing and freeze-drying to obtain chitosan microspheres; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol in a mass ratio of 1:1.8 ethanol solution of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, cholesterol hemisuccinate, chitosan microspheres and cholesterol hemisuccinate in a molar ratio of 1:0.3, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 0.8 wt% molybdenum salt water solution and 80% ethanol into modified chitosan, heating to 75-85 deg.C, reacting for 2-3 hr, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 15mol/L, the concentration of ferric nitrate is 0.07mol/L, and the corrosion is carried out for 60min at 170 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 4.0-4.5nm, the distance between two adjacent walls of the hole is 20-25 mu m, and the thickness of the hole array area is 2-10 mu m; dispersing nano silicon in deionized water to form 3% nano silicon suspension, adding silver nitrate solution while stirring, adjusting pH to 9, stirring for 4-7h in dark environment, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 3% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
Example 5
Comprises the following components in parts by weight: 16 parts of modified chitosan catalyst, 15 parts of silver bromide-silver/nano silicon, 15 parts of sodium laurate hydrogel, 10 parts of agar hydrogel, 3 parts of polyether and dimethyl siloxane graft copolymer, 2 parts of modified polydimethylsiloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:2.5; reacting for 24h at the temperature of 80 ℃, washing, filtering and drying reactants, adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in acetic acid solution with mass fraction of 4.5%; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol in a mass ratio of 1:1.8 ethanol solution of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and cholesterol hemisuccinate, the molar ratio of chitosan microspheres to cholesterol hemisuccinate is 1:0.3, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 0.8 wt% molybdenum salt aqueous solution and 80% ethanol into the modified chitosan, heating to 75-85 deg.C, reacting for 2-3h, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 13mol/L, the concentration of ferric nitrate is 0.05mol/L, and the corrosion is carried out for 60min at the temperature of 100 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 3-3.5nm, the distance between two adjacent walls of the hole is 10-15 mu m, and the thickness of the hole array area is 18-23 mu m; dispersing nano silicon in deionized water to form 1.5% nano silicon suspension, stirring, adding silver nitrate solution, adjusting pH to 8, stirring in dark environment for 4-7h, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1.5% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
Example 6
Comprises the following components in parts by weight: 12 parts of modified chitosan catalyst, 15 parts of silver bromide-silver/nano silicon, 22 parts of polyethylene glycol hydrogel, 2 parts of polyether-dimethyl siloxane graft copolymer, 2 parts of modified polydimethylsiloxane and the balance of water;
wherein, the modified chitosan catalyst is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1:2.5; reacting for 24h at the temperature of 80 ℃, washing, filtering and drying reactants, adding acetone to dissolve and crystallize to obtain cholesterol hemisuccinate; dissolving chitosan powder in acetic acid solution with mass fraction of 4.5%; placing the chitosan microspheres in water for swelling, and sequentially adding absolute ethyl alcohol in a mass ratio of 1:1.8 ethanol solution of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, cholesterol hemisuccinate, chitosan microspheres and cholesterol hemisuccinate in a molar ratio of 1:0.3, after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing for 2-3d by using 85% ethanol solution, 75% ethanol solution, 65% ethanol solution and 55% ethanol solution as dialysis media and distilled water respectively in sequence, replacing the dialysis media every 4-5h, filtering the dialysate, and freeze-drying to obtain the modified chitosan; adding 0.8 wt% molybdenum salt aqueous solution and 80% ethanol into the modified chitosan, heating to 75-85 deg.C, reacting for 2-3h, filtering, and drying to obtain the final product;
the silver bromide-silver/nano silicon is prepared by the following method: taking a monocrystalline silicon wafer as a base material, and forming a cylindrical silicon nanopore array by adopting a hydrothermal corrosion method, wherein the conditions of the hydrothermal corrosion method are as follows: the concentration of hydrofluoric acid is 15mol/L, the concentration of ferric nitrate is 0.07mol/L, and the corrosion is carried out for 40min at 150 ℃; the aperture of the silicon column on the substrate is gradually reduced from 40 +/-5 nm of the top of the column to 15 +/-5 nm of the bottom of the column, the size range of the silicon column is 3.8-4.2nm, the distance between two adjacent walls of the hole is 16-23 mu m, and the thickness of the hole array area is 8-15 mu m; dispersing nano silicon in deionized water to form 2.5% nano silicon suspension, adding silver nitrate solution while stirring, adjusting pH to 8, stirring for 4-7h in dark environment, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 2.5% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
Comparative example 1
On the basis of example 1, titanium dioxide was substituted in equal amounts for the modified chitosan catalyst.
Comparative example 2
On the basis of example 2, chitosan microspheres were replaced with chitosan in equal amounts.
Comparative example 3
On the basis of example 3, chitosan was equally substituted for the modified chitosan.
Comparative example 4
On the basis of example 4, silver bromide-silver/nano silicon is equivalently replaced by silver bromide-silver/molecular sieve.
Comparative example 5
On the basis of example 5, natural silicon is equivalently replaced by silver bromide-silver/nano-silicon.
Comparative example 6
On the basis of example 6, the nano silicon is equally replaced by the natural silicon.
The following tests were carried out on the high-efficiency remover prepared by the present invention:
(1) Structural and compositional testing (example 1 is taken as an example):
FIG. 1a is a FESEM image of nano-silicon, which is observed to consist of a large number of regularly arranged, micron-sized silicon pillars; fig. 1b is a FESEM photograph of silver-silver bromide/nano-silicon, and it is observed that a thin film composed of particles with smaller particle size is formed at the top of the pillars of the sample, and a large number of nano-crystalline grains with uniform and loose size are formed in the inter-pillar regions, so that the particle size and dispersibility of silver bromide are good, and the mass percentages of the elements obtained from EDS energy spectrum are as follows: 64.13 percent of O, 34.64 percent of Si, 0.48 percent of Br and 0.75 percent of Ag, wherein the content of Ag is slightly larger than that of Br, which shows that a small amount of Ag + in AgBr is reduced into Ag under visible light, so that the content of Ag on the surface of the AgBr is larger than that of Br.
FIG. 2 is a TEM image of the modified chitosan, the left image and the right image are 20000X and 40000X magnification respectively, and the observation shows that the nanoparticles are in a uniform spherical structure, have good sphericity and uniform particle size distribution, and indicate that smooth and non-sticky substances exist.
(2) Testing the air purification performance:
simulating an environment with the formaldehyde pollution concentration of 200 mug/L in a sealed light-proof climate box, spraying a sample on 0.1m × 0.1m non-woven fabrics in the sealed light-proof climate box, wherein the spraying amount in each box body is the same, the climate box is arranged in an indoor visible light environment, so that the sample to be detected fully receives visible light, closing a climate box cover and sealing, connecting a bottom air pressure balancing port to a water tank to keep the air pressure and the pollution gas concentration in the climate box during sampling, starting a convection fan to keep the gas concentrations in all parts in the climate box equal, closing an air inlet after the pollution gas is introduced to the initial concentration, and starting a photodegradation process; sampling air in a climatic chamber by a micro-sampling pump, and determining gas content change in the degradation process by adopting a gas chromatography;
the removal rate of the contaminated gas is calculated according to the formula (1): n = (C) 0 —C t )V/(S×t) (1)
Wherein n is the pollutant gas removal rate of the sample, and the mu g/(m < 2 >. S); c 0 The initial concentration of contaminant gas, μ g/m, at the beginning of degradation 3 ；C t Is the equilibrium concentration of the contaminated gas at time t, μ g/m 3 (ii) a V is the gas volume of the experimental box, m 3 (ii) a S is the surface area of the coating, m 2 (ii) a t is the time elapsed from the start of the test to the end of the degradation, s;
the removal rate of the contaminated gas is calculated according to the formula (2): q = (C) 0 —C t )/C 0 ×100％ (2)
Wherein q is the pollutant gas removal rate,%; c 0 Initial concentration of contaminant gases for the beginning of degradation, μ g/m 3 ；C t Is the equilibrium concentration of the polluting gas at time t, μ g/m 3 (ii) a t is the time elapsed from the start of the test to the end of the degradation, s; the same method is adopted to repeatedly test the formaldehyde by replacing the formaldehyde with ammonia, NOx, methyl mercaptan and toluene, and the test result of 6h is shown in the following table 1:
TABLE 1
(3) Air purification durability test
Simulating the environment with the formaldehyde pollution concentration of 200 mug/L in a sealed light-proof climate box, spraying a sample on 0.1m × 0.1m non-woven fabrics in the sealed light-proof climate box, wherein the spraying amount in each box is the same, the climate box is arranged in an indoor visible light environment, so that the sample to be tested can fully receive visible light, closing a climate box cover and sealing, connecting a bottom air pressure balancing port to a water box to keep the air pressure and the pollution gas concentration in the climate box during sampling, starting a convection fan to keep the gas concentration in each position in the climate box equal, introducing the pollution gas to the initial concentration, closing an air inlet, carrying out detection, recording the initial formaldehyde concentration in the box, recording the formaldehyde concentration in the box again after 6h, 24h, 3d, 7d, 15d and 30d, calculating the formaldehyde removal rate, and testing results are shown in the following table 2:
TABLE 2
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (14)
1. The efficient remover for indoor formaldehyde and organic volatile matters is characterized by comprising the following components in parts by weight: 12-18 parts of modified chitosan catalyst, 8-15 parts of silver bromide-silver/nano silicon, 20-25 parts of hydrogel, 1-3 parts of wetting agent, 0.5-2 parts of defoaming agent and the balance of water;
the modified chitosan catalyst is prepared by carrying molybdate on modified chitosan;
the silver bromide-silver/nano silicon is prepared by attaching silver bromide to a nano silicon wafer.
2. The efficient remover of indoor formaldehyde and organic volatile matter as claimed in claim 1, wherein: the modified chitosan catalyst is prepared by the following method: adding 0.5-1.2 wt% molybdenum salt aqueous solution and 70-80% ethanol into modified chitosan, heating to 75-85 deg.C, reacting for 2-3 hr, filtering, and drying.
3. The efficient remover for indoor formaldehyde and organic volatile matters according to claim 1, wherein the modified chitosan is prepared by the following method: dissolving cholesterol in pyridine, and adding succinic anhydride, wherein the molar ratio of the cholesterol to the succinic anhydride is 1: (2-3); reacting at 80-90 deg.C for 20-28h, washing, filtering, drying, adding acetone, dissolving, and crystallizing to obtain cholesterol hemisuccinate; placing the chitosan microspheres in water for swelling, and then sequentially adding absolute ethyl alcohol, a coupling agent and an ethanol solution of cholesterol hemisuccinate, wherein the molar ratio of the chitosan microspheres to the cholesterol hemisuccinate is 1: (0.2-0.35), after reacting for 2-4d, putting the reaction solution into a dialysis bag, dialyzing by using a dialysis medium, filtering the dialysate, and freeze-drying to obtain the product.
4. The efficient removing agent for indoor formaldehyde and organic volatile matter as claimed in claim 3, wherein: the dialysis process is as follows: sequentially dialyzing with ethanol solution of different concentrations as dialysis medium and distilled water for 2-3d, and replacing dialysis medium every 4-5 h.
5. The efficient remover of indoor formaldehyde and organic volatiles according to claim 4, wherein: the dialysis medium is 85% ethanol solution, 75% ethanol solution, 65% ethanol solution, or 55% ethanol solution.
6. The efficient remover of indoor formaldehyde and organic volatile matter as claimed in claim 1, wherein: the coupling agent is prepared from the following components in a mass ratio of 1: 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide of (1.5-2).
7. The efficient remover of indoor formaldehyde and organic volatile matter as claimed in claim 1, wherein: the chitosan microsphere is prepared by the following method: dissolving chitosan powder in acetic acid solution with mass fraction of 1-5%.
8. The efficient remover of indoor formaldehyde and organic volatile matter as claimed in claim 1, wherein: the silver bromide-silver/nano silicon catalyst is prepared by the following method: dispersing nano silicon in deionized water to form 1-3% nano silicon suspension, stirring, adding silver nitrate solution, adjusting pH to 7-9, stirring in dark environment for 4-7h, centrifuging, and drying to obtain silver bromide/nano silicon; dispersing silver bromide/nano silicon in deionized water to form 1-3% suspension, stirring for 1-1.5h under illumination, centrifuging, and drying.
9. The efficient remover of indoor formaldehyde and organic volatiles according to claim 8, wherein: the nano silicon is a silicon nano pore array, the pore diameter on the silicon column is gradually reduced from 40 +/-5 nm at the top of the column to 15 +/-5 nm at the bottom of the column, the size range of the silicon column is 1.9-4.5nm, and the thickness of a pore array area is 2-20 mu m.
10. The efficient remover of indoor formaldehyde and organic volatiles according to claim 9, wherein: the hydrothermal corrosion solution is a mixed aqueous solution of hydrofluoric acid and ferric nitrate, wherein the concentration of the hydrofluoric acid is 12-15mol/L, and the concentration of the ferric nitrate is 0.04-0.07mol/L.
11. The efficient remover of indoor formaldehyde and organic volatile matter as claimed in claim 1, wherein: the hydrogel is one or a mixture of more than two of sodium laurate hydrogel, sodium alginate hydrogel, polyvinyl alcohol hydrogel, polyacrylamide hydrogel, agar hydrogel and polyethylene glycol hydrogel.
12. A method for preparing the efficient remover for indoor formaldehyde and organic volatile matters according to any one of claims 1 to 11, which is characterized by comprising the following steps: heating and dissolving the hydrogel to be transparent, adding a wetting agent and a defoaming agent, and dispersing at medium speed for 20-40min; then adding a modified chitosan catalyst, silver bromide-silver/nano silicon, and dispersing at high speed for 30-40min; adding water to adjust the viscosity.
13. Use of the efficient remover as claimed in claims 1-10 for indoor air purification.
14. Use according to claim 13, characterized in that: and covering the remover on the surface of the base material in a brushing, roll coating, dip coating or spraying mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210794164.0A CN115155306B (en) | 2022-07-05 | 2022-07-05 | Efficient remover for indoor formaldehyde and organic volatile matters, preparation method and application |
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Cited By (2)
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| CN115039793A (en) * | 2022-07-05 | 2022-09-13 | 汕头市优森活新材料科技有限公司 | Indoor efficient antibacterial smell-cleaning agent and preparation method and application thereof |
| CN115637121A (en) * | 2022-10-31 | 2023-01-24 | 汕头市优森活新材料科技有限公司 | Chitosan modified adhesive and preparation method thereof |
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| CN115155306B (en) | 2024-01-26 |
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