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Preparation method of ClO2 sustained-release gel of composite photocatalyst

A composite photocatalyst, slow-release gel technology, applied in the directions of gel preparation, separation method, chemical instrument and method, etc., to achieve the effect of low cost and avoid secondary pollution

Inactive Publication Date: 2021-07-09
叁素(浙江)新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its limitation is that photocatalysis must be performed under the condition of light.

Method used

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  • Preparation method of ClO2 sustained-release gel of composite photocatalyst
  • Preparation method of ClO2 sustained-release gel of composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Weigh 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, grind them separately, pass through a 60-mesh sieve, and Mix evenly after drying to obtain 100g of solid A agent.

[0031] 2. Add 0.04g of sodium hexametaphosphate and 2g of highly dispersed modified nano-titanium dioxide to 400ml of deionized water, and stir to obtain about 400ml of liquid B agent.

[0032] 3. Put 100g of the above-mentioned solid agent A into the above-mentioned 400ml of the liquid agent B, stir for 2 minutes and then let it stand for 30 minutes to obtain a stable pale yellow gel.

[0033] 4. Evenly sprinkle 5g of coconut shell activated carbon (60 mesh) on the surface of the gel to obtain the ClO of the composite photocatalyst. 2 Slow release gel.

Embodiment 2

[0035] 1. Weigh 30g sodium chlorite, 10g sodium citrate, 10g sodium dihydrogen phosphate, 35g sodium carboxymethylcellulose, 5g PEG-2000, 10g anhydrous calcium chloride, grind them respectively, pass through a 60-mesh sieve and Mix evenly after drying to obtain 100g of solid A agent.

[0036] 2. Add 0.12g of sodium hexametaphosphate and 4g of highly dispersed modified nano-titanium dioxide to 400ml of deionized water, and stir to obtain about 400ml of liquid B agent.

[0037] 3. Put 100g of the above-mentioned solid agent A into the above-mentioned 400ml of the liquid agent B, stir for 2 minutes and then let it stand for 30 minutes to obtain a stable pale yellow gel.

[0038] 4. Evenly sprinkle 5g of coconut shell activated carbon (60 mesh) on the surface of the gel to obtain the ClO of the composite photocatalyst. 2 Slow release gel.

Embodiment 3

[0040] 1. Weigh 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, grind them separately, pass through a 60-mesh sieve, and Mix evenly after drying to obtain 100g of solid A agent.

[0041] 2. Add 0.12g of sodium hexametaphosphate and 4g of highly dispersed modified nano-titanium dioxide to 400ml of deionized water, and stir to obtain about 400ml of liquid B agent.

[0042] 3. Put 100g of the above-mentioned solid agent A into the above-mentioned 400ml of the liquid agent B, stir for 2 minutes and then let it stand for 30 minutes to obtain a stable pale yellow gel.

[0043] 4. Evenly sprinkle 5g of coconut shell activated carbon (60 mesh) on the surface of the gel to obtain the ClO of the composite photocatalyst. 2 Slow release gel.

[0044] Add 20 mL of 5% potassium iodide solution, 0.5 mol / L H 2 S0 4Solution 24mL, 1% starch indicator 0.4mL, then feed...

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Abstract

The invention discloses a preparation method of ClO2 sustained-release gel of a composite photocatalyst. The preparation method comprises the following steps: analyzing the chlorine dioxide sustained-release performance of a solid agent A and a liquid agent B, preparing the solid agent A, preparing the liquid agent B and preparing the gel. According to the preparation method of the ClO2 slow-release gel of the composite photocatalyst, formaldehyde, benzene series, ammonia, TVOCs, germs and the like in air are purified and removed by utilizing a ClO2 oxidation and nano-photocatalyst composite adsorbent synergistic system, so that the ClO2 slow-release effect is enhanced, and the service life of the gel is longer; and meanwhile, a modifier which is natural cellulose, namely sodium carboxymethyl cellulose, is adopted as a gel agent, so that the gel has the characteristics of low cost, no toxicity, no harm, good biodegradability and the like, and the problem of secondary pollution to the environment after use is avoided.

Description

technical field [0001] The present invention relates to ClO 2 Sustained-release gel technical field, specifically a kind of ClO of composite photocatalyst 2 Preparation method of sustained-release gel. Background technique [0002] Chlorine dioxide (ClO 2 ) is a broad-spectrum fungicide that exists in a gaseous state at normal temperature and pressure, and has high-efficiency removal effects on air pollutants such as formaldehyde, benzene series, ammonia, and hydrogen sulfide. Low-concentration ClO 2 It is an internationally recognized safe and non-toxic green disinfectant, because it only has destructive effects on lower biological cells, and has no carcinogenic, teratogenic, and mutagenic (three-caused) effects on higher animal cells, sperm and chromosomes. Sex is positioned at the A1 level by the World Health Organization. However, ClO 2 It is a gas at normal temperature and pressure, and its release concentration is difficult to control. Too high a concentration of ...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01D53/86B01D53/68B01D53/00
CPCB01J13/0056B01J13/0065B01J13/006B01D53/8659B01D53/68B01D53/007B01D2257/204B01D2258/06B01D2251/304B01D2251/60B01D2251/70B01D2251/80
Inventor 周燚平陈姆妹
Owner 叁素(浙江)新材料科技有限责任公司
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