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CN113083171A - ClO of composite photocatalyst2Method for preparing sustained-release gel - Google Patents

ClO of composite photocatalyst2Method for preparing sustained-release gel Download PDF

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CN113083171A
CN113083171A CN202110261603.7A CN202110261603A CN113083171A CN 113083171 A CN113083171 A CN 113083171A CN 202110261603 A CN202110261603 A CN 202110261603A CN 113083171 A CN113083171 A CN 113083171A
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gel
preparation
mass ratio
clo
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周燚平
陈姆妹
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Sansu Zhejiang New Material Technology Co ltd
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Sansu Zhejiang New Material Technology Co ltd
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    • 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
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0056—Preparation of gels containing inorganic material and water
    • 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
    • B01D53/007—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 irradiation
    • 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
    • B01D53/68—Halogens or halogen compounds
    • 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
    • B01D53/8659—Removing halogens or halogen compounds
    • 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
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0056—Preparation of gels containing inorganic material and water
    • B01J13/006—Preparation of gels containing inorganic material and water by precipitation, coagulation, hydrolyse coacervation
    • 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
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0065—Preparation of gels containing an organic phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/70—Organic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/80—Organic bases or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air

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  • Chemical & Material Sciences (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

The invention discloses a ClO of a composite photocatalyst2The preparation method of the sustained-release gel comprises a solid agent A and a liquid agent B, the analysis of the sustained-release performance of the chlorine dioxide, the preparation of the solid agent A, the preparation of the liquid agent B → the preparation of the gel. ClO of the composite photocatalyst2Method for preparing sustained-release gel by using ClO2Oxidizing, purifying and removing formaldehyde, benzene series, ammonia, TVOC, germs and the like in the air by a synergistic system of the nano photocatalyst composite adsorbent, thereby enhancing the ClO2The gel has sustained-release effect, so that the service life of the gel is longer, and simultaneously, the gel adopts the sodium carboxymethyl cellulose which is a modified substance of natural cellulose as the gel, so that the gel has low costThe environment-friendly biological agent has the characteristics of no toxicity, no harm, good biodegradability and the like, and avoids the problem of secondary pollution to the environment after use.

Description

ClO of composite photocatalyst2Method for preparing sustained-release gel
Technical Field
The present invention relates to ClO2The technical field of sustained-release gel, in particular to ClO of a composite photocatalyst2A preparation method of sustained-release gel.
Background
Chlorine dioxide (ClO)2) Is a broad-spectrum bactericide existing in a gaseous state at normal temperature and pressureAnd has high-efficiency removal effect on air pollutants such as formaldehyde, benzene series, ammonia, hydrogen sulfide and the like, and low-concentration ClO2Is an internationally recognized safe and nontoxic green disinfectant, because the disinfectant only has destructive effect on lower biological cells, has no carcinogenic, teratogenic and mutagenic (triprodogenic) effects on higher animal cells, sperms and chromosomes, and has safety of A1 level positioned by the world health organization. However, ClO2The ClO is a gas at normal temperature and normal pressure, the release concentration is difficult to control, and the ClO with excessive concentration2Can injure the respiratory tract of human body, and even explode in extreme cases. The purification effect cannot be lasting after the release is too fast, and the application of the composite material is limited to a certain extent.
The photocatalyst is a compound of TiO2The photo-semiconductor material with the photocatalytic function can degrade organic pollutants such as formaldehyde, benzene series, TVOC and the like into harmless products in a short time under the irradiation of ultraviolet light or visible light, and does not generate consumption before and after reaction, so that the photo-semiconductor material has self-cleaning property and lasting effect, and is widely applied to the fields of air purification, medical treatment, wastewater treatment, food and the like at present. The limitation is that the photocatalytic effect must be effective in the presence of light.
Therefore, a ClO of a composite photocatalyst is provided2A preparation method of sustained-release gel. Using gel as carrier and ClO2The oxidation and visible light catalysis combined technology can effectively solve the defects of the prior art. The gel has a network resistance structure and can slow down ClO2The combination rate of the precursor and the activator is reduced, thereby slowing the reaction rate and realizing the ClO2Slow and relatively smooth release; photocatalyst can catalytically degrade part of ClO2The intermediate products of the harmful substances which are difficult to degrade promote the reaction to be carried out in the positive direction, play a role in synergy, and improve the durability of the gel while ensuring the air purification efficiency.
Disclosure of Invention
The invention aims to provide a composite photocatalyst ClO2The preparation method of the sustained-release gel solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: ClO of composite photocatalyst2The preparation method of the sustained-release gel comprises a solid agent A and a liquid agent B, the analysis of the sustained-release performance of the chlorine dioxide, the preparation of the solid agent A, the preparation of the liquid agent B → the preparation of the gel.
Preferably, the preparation of the solid agent A comprises the following ingredients: main agent, activating agent, gel, slow release agent and filling agent.
(1) A main agent: one or more of sodium chlorite, sodium chlorate and potassium chlorite, wherein the mass ratio of the sodium chlorite, the sodium chlorate and the potassium chlorite is 25-35%, and the preferable combination is 28-30% of sodium chlorite;
(2) activating agent: one or a mixture of more of citric acid, tartaric acid, EDTA, lactic acid, oxalic acid, sodium dihydrogen phosphate and potassium hydrogen phthalate, wherein the mass ratio of the citric acid to the sodium dihydrogen phosphate is 15-25%, the preferable combination is citric acid and sodium dihydrogen phosphate (the mass ratio of the two components is 1:1), and the mass ratio of the activating agent is 18-21%;
(3) gelling agent: one of sodium carboxymethylcellulose, acid chitosan, sodium alginate and agar, the mass ratio of the sodium carboxymethylcellulose to the acid chitosan to the sodium alginate is 30-50%, and the preferable combination is sodium carboxymethylcellulose, and the mass ratio of the sodium carboxymethylcellulose to the agar is 35-38%;
(4) sustained release agent: one of PEG-1000, PEG-1500, PEG-2000 and PEG-4000, the mass ratio of the PEG-1000, the PEG-1500, the PEG-2000 and the PEG-4000 is 4-12%, and the preferable combination is PEG2000, and the mass ratio of the PEG2000 to the PEG 4000 is 3-5%;
(5) filling agent: one or more of anhydrous calcium chloride, calcium carbonate and magnesium carbonate in an amount of 5-15 wt%, preferably 10-12 wt%.
The preparation process of the solid agent A comprises the following steps: grinding → sieving → drying → mixing uniformly according to the mass ratio.
Preferably, the preparation of the liquid agent B comprises the following ingredients: photocatalyst, dispersant and deionized water.
(1) Photocatalyst: the components are high-dispersion modified nano titanium dioxide (the average grain diameter is less than 5nm, and the response to visible light) with the mass ratio of 0.5-1%;
(2) dispersing agent: the component is sodium hexametaphosphate, and the mass ratio is 0.01-0.03%;
(3) deionized water: the mass ratio is the balance.
The preparation process of the liquid B agent comprises the following steps: and (3) adding the dispersing agent and the photocatalyst particles into the deionized water according to the mass ratio → stirring and mixing uniformly.
Preferably, the preparation of the gel comprises the following ingredients: solid agent A, liquid agent B and 60-mesh coconut shell activated carbon.
(1) Solid agent A: 8-12 parts by mass;
(2) liquid B agent: 30-40 parts of a binder;
(3) 60-mesh coconut shell activated carbon: 0.2 to 0.5 portion.
The preparation process of the gel comprises the following steps: pouring the solid agent A into the liquid agent B according to the proportion → stirring and mixing evenly → forming gel → evenly sprinkling 30-60 meshes of coconut shell activated carbon on the upper surface of the gel → ClO of the composite photocatalyst2A slow release gel.
Compared with the prior art, the invention has the beneficial effects that: using gel as carrier and ClO2Oxidation and visible light catalysis combined technology for realizing ClO2Slowly and relatively smoothly releases, and simultaneously the photocatalyst can catalyze and degrade part of ClO2The intermediate products of the harmful substances which are difficult to degrade promote the reaction to be carried out in the positive direction, so that the synergistic effect is achieved, the air purification efficiency is ensured, and the durability of the gel is improved; the sodium carboxymethylcellulose which is a modified substance of natural cellulose is used as the gelling agent, so that the prepared gel has the characteristics of low cost, no toxicity, no harm, biodegradability and the like, and secondary pollution to the environment after use is avoided.
Drawings
FIG. 1 is a schematic diagram showing the relationship between the residence time and the chlorine dioxide release flux according to the present invention;
FIG. 2 is a schematic diagram showing the relationship between the time for continuing the standing after the chlorine dioxide is released and the formaldehyde removal rate.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: ClO of composite photocatalyst2The preparation method of the sustained-release gel comprises a solid agent A and a liquid agent B, and comprises the steps of analyzing the sustained-release performance of chlorine dioxide, preparing the solid agent A, preparing the liquid agent B → preparing the gel.
Example 1
1. 25g of sodium chlorite, 12g of sodium citrate, 12g of sodium dihydrogen phosphate, 35g of sodium carboxymethylcellulose, 4g of PEG-2000 and 12g of anhydrous calcium chloride are weighed, respectively ground, sieved by a 60-mesh sieve, dried and uniformly mixed to obtain 100g of a solid A agent.
2. 0.04g of sodium hexametaphosphate and 2g of high-dispersion modified nano titanium dioxide are respectively added into 400ml of deionized water, and about 400ml of liquid B agent is obtained after uniform stirring.
3. Adding 100g of the solid A into 400ml of the liquid B, stirring for 2min, and standing for 30min to obtain a stable light yellow gel.
4. 5g of coconut shell activated carbon (60 meshes) is uniformly sprinkled on the surface of the gel to obtain the ClO of the composite photocatalyst2A slow release gel.
Example 2
1. 30g of sodium chlorite, 10g of sodium citrate, 10g of sodium dihydrogen phosphate, 35g of sodium carboxymethylcellulose, 5g of PEG-2000 and 10g of anhydrous calcium chloride are weighed, respectively ground, sieved by a 60-mesh sieve, dried and uniformly mixed to obtain 100g of a solid A agent.
2. 0.12g of sodium hexametaphosphate and 4g of high-dispersion modified nano titanium dioxide are respectively added into 400ml of deionized water, and the mixture is uniformly stirred to obtain about 400ml of liquid B agent.
3. Adding 100g of the solid A into 400ml of the liquid B, stirring for 2min, and standing for 30min to obtain a stable light yellow gel.
4. 5g of coconut shell activated carbon (60 meshes) is uniformly sprinkled on the surface of the gel to obtain the ClO of the composite photocatalyst2A slow release gel.
Example 3
1. 35g of sodium chlorite, 8g of sodium citrate, 8g of sodium dihydrogen phosphate, 32g of sodium carboxymethylcellulose, 12g of PEG-2000 and 5g of anhydrous calcium chloride are weighed, respectively ground, sieved by a 60-mesh sieve, dried and uniformly mixed to obtain 100g of a solid A agent.
2. 0.12g of sodium hexametaphosphate and 4g of high-dispersion modified nano titanium dioxide are respectively added into 400ml of deionized water, and the mixture is uniformly stirred to obtain about 400ml of liquid B agent.
3. Adding 100g of the solid A into 400ml of the liquid B, stirring for 2min, and standing for 30min to obtain a stable light yellow gel.
4. 5g of coconut shell activated carbon (60 meshes) is uniformly sprinkled on the surface of the gel to obtain the ClO of the composite photocatalyst2A slow release gel.
20mL of 5% potassium iodide solution and 0.5mol/L H were added to a transparent 1L jar2S0424mL of the solution and 0.4mL of 1% starch indicator, then introducing nitrogen with a purity of more than 99% into the jar, replacing the air, and taking a proper amount of the gel just prepared according to the method described in example 1 from a 50mL beaker and quickly placing the gel into the jar. Capped seal and start timing and observation, after the solution in the jar turned blue, the time was noted and the released C10 was immediately analyzed by titration with a calibrated sodium thiosulfate standard solution2And (3) calculating the mass, namely calculating the average release flux Fi, wherein the calculation formula is as follows:
Fi(mg·h-1·cm-2)＝Gi/(t×S)
in the formula: fi-average Release flux, mg.h-1cm-2；
Gi-C10 released over a period of time2Mass (through Na)2S4O6Calculated by titration), mg:
t-release time, h;
s-release area, i.e. contact area of gel with air
As shown in FIG. 1, the average release flux Fi of the gels of examples 1-3 was analyzed in different time periods according to the above method, and a set of samples prepared in the same manner as example 3 except that no photocatalyst and dispersant were added to the liquid B formulation was also analyzed; the analysis result shows that: the slow release period of the poured gel prepared by the method can reach more than 80 days, and the slow release effect of the chlorine dioxide is obvious. Secondly, in the preparation process of the gel, the addition of photocatalyst powder and a dispersing agent sodium hexametaphosphate in the liquid B agent has no obvious influence on the formation of the gel and the slow release performance of the chlorine dioxide.
As shown in FIG. 2, ClO is a photocatalyst introduced into the gel of the present invention2After the gradual release is finished, the medicine can still continuously play a role. ClO as reactants consumed during gel standing2No longer release, and the nano TiO distributed among the gel frameworks2The particles begin to play a major role. Harmful gas in the air is fully contacted with the gel after being adsorbed by the adsorption effect of the activated carbon particles on the surface layer of the gel, and the gel body has higher light transmittance, so that the nano TiO2The particles continue to undergo photocatalytic decomposition. To verify ClO2After the release is finished, the continuous purification efficiency of the gel is determined by adopting QB/T2761-2006 method for determining purification effect of indoor air purification product2After release, 50g of each of the gels of examples 1-3 and the reference gel were placed in a 100ml open beaker and 1.5m3Testing the chamber, and starting a fluorescent lamp to detect the formaldehyde removal rate; test results show that the method for preparing the gel in the ClO2After the release is finished, pollutants such as formaldehyde and the like can be continuously removed through a photocatalytic effect, and the formaldehyde removal efficiency is kept relatively high. The reference sample has a certain formaldehyde removal capacity in a short period mainly due to the adsorption effect of an activated carbon layer laid on the surface of the gel, but the activated carbon layer rapidly loses efficacy in a short period without the cooperation of the photocatalyst.
ClO of the composite photocatalyst of the invention2The preparation method of the sustained-release gel comprises the steps of respectively grinding, sieving and drying the main agent, the activating agent, the gelling agent, the sustained-release agent and the filling agent, uniformly mixing according to the proportion in the table to obtain the solid A agent, and then mixing the dispersing agent and the photocatalyst particles according to the mass ratio in the tableRespectively adding the mixture into deionized water, uniformly stirring to obtain a liquid agent B, pouring a solid agent A into the liquid agent B according to the mass ratio, uniformly stirring, standing until the mixture forms gel, and uniformly spraying 30-60 meshes of coconut shell activated carbon on the upper surface of the gel to obtain the ClO of the composite photocatalyst2The slow release gel of the invention is introduced with photocatalyst, ClO2The gel can still continuously play a role after the gradual release is finished, and the ClO can be consumed along with the reactants in the gel placing process2No longer release, and the nano TiO distributed among the gel frameworks2The particles begin to play a main role, harmful gas in the air is fully contacted with the gel after being adsorbed by the adsorption effect of the activated carbon particles on the surface layer of the gel, and the gel body has higher light transmittance, so that the nano TiO can be used for2The particles were continuously subjected to photocatalytic decomposition to verify the ClO2After the release is finished, the continuous purification efficiency of the gel is determined by adopting QB/T2761-2006 method for determining purification effect of indoor air purification product2After release, 50g of each of the gels of examples 1-3 and the reference gel were placed in a 100ml open beaker and 1.5m3And (5) testing the cabin, and starting a fluorescent lamp to detect the formaldehyde removal rate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. ClO of composite photocatalyst2The preparation method of the sustained-release gel is characterized by comprising the following steps: the method comprises a solid agent A and a liquid agent B, the analysis of the slow release performance of the chlorine dioxide, the preparation of the solid agent A, the preparation of the liquid agent B → the preparation of gel.
2. The ClO of composite photocatalyst as claimed in claim 12The preparation method of the sustained-release gel is characterized by comprising the following steps: the preparation of the solid agent A comprises the following ingredients: main agent, activator, gel agent and slow releaseRelease agents and fillers.
(1) A main agent: one or more of sodium chlorite, sodium chlorate and potassium chlorite, wherein the mass ratio of the sodium chlorite, the sodium chlorate and the potassium chlorite is 25-35%, and the preferable combination is 28-30% of sodium chlorite;
(2) activating agent: one or a mixture of more of citric acid, tartaric acid, EDTA, lactic acid, oxalic acid, sodium dihydrogen phosphate and potassium hydrogen phthalate, wherein the mass ratio of the citric acid to the sodium dihydrogen phosphate is 15-25%, the preferable combination is citric acid and sodium dihydrogen phosphate (the mass ratio of the two components is 1:1), and the mass ratio of the activating agent is 18-21%;
(3) gelling agent: one of sodium carboxymethylcellulose, acid chitosan, sodium alginate and agar, the mass ratio of the sodium carboxymethylcellulose to the acid chitosan to the sodium alginate is 30-50%, and the preferable combination is sodium carboxymethylcellulose, and the mass ratio of the sodium carboxymethylcellulose to the agar is 35-38%;
(4) sustained release agent: one of PEG-1000, PEG-1500, PEG-2000 and PEG-4000, the mass ratio of the PEG-1000, the PEG-1500, the PEG-2000 and the PEG-4000 is 4-12%, and the preferable combination is PEG2000, and the mass ratio of the PEG2000 to the PEG 4000 is 3-5%;
(5) filling agent: one or more of anhydrous calcium chloride, calcium carbonate and magnesium carbonate in an amount of 5-15 wt%, preferably 10-12 wt%.
The preparation process of the solid agent A comprises the following steps: grinding → sieving → drying → mixing uniformly according to the mass ratio.
3. The ClO of composite photocatalyst as claimed in claim 12The preparation method of the sustained-release gel is characterized by comprising the following steps: the preparation of the liquid agent B comprises the following ingredients: photocatalyst, dispersant and deionized water.
(1) Photocatalyst: the components are high-dispersion modified nano titanium dioxide (the average grain diameter is less than 5nm, and the response to visible light) with the mass ratio of 0.5-1%;
(2) dispersing agent: the component is sodium hexametaphosphate, and the mass ratio is 0.01-0.03%;
(3) deionized water: the mass ratio is the balance.
The preparation process of the liquid B agent comprises the following steps: and (3) adding the dispersing agent and the photocatalyst particles into the deionized water according to the mass ratio → stirring and mixing uniformly.
4. The ClO of composite photocatalyst as claimed in claim 12The preparation method of the sustained-release gel is characterized by comprising the following steps: the preparation of the gel comprises the following ingredients: solid agent A, liquid agent B and 60-mesh coconut shell activated carbon.
(1) Solid agent A: 8-12 parts by mass;
(2) liquid B agent: 30-40 parts of a binder;
(3) 60-mesh coconut shell activated carbon: 0.2 to 0.5 portion.
The preparation process of the gel comprises the following steps: pouring the solid agent A into the liquid agent B according to the proportion → stirring and mixing evenly → forming gel → evenly sprinkling 30-60 meshes of coconut shell activated carbon on the upper surface of the gel → ClO of the composite photocatalyst2A slow release gel.
CN202110261603.7A 2021-03-10 2021-03-10 ClO of composite photocatalyst2Method for preparing sustained-release gel Pending CN113083171A (en)

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Cited By (2)

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CN113893670A (en) * 2021-10-28 2022-01-07 大庆中环评价检测有限公司 Non-toxic indoor long-acting disinfection gel product
CN114847278A (en) * 2022-06-17 2022-08-05 德镕科技(深圳)有限公司 Light-excited chlorine dioxide nano composite disinfection gel and preparation and use methods thereof

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CN104147924A (en) * 2014-08-15 2014-11-19 郑州绿叶堂本草科技有限公司 Novel photo-catalyst air purifying agent and preparation method
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Application publication date: 20210709