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Wallpaper for photocatalytic synergistic decomposition of formaldehyde and preparation method thereof

A photocatalysis, formaldehyde technology, applied in separation methods, chemical instruments and methods, special paper and other directions, can solve the problem of low efficiency of decomposing formaldehyde, and achieve the effect of improving decomposition performance and promoting decomposition

Active Publication Date: 2021-10-22
上海威泽装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a photocatalyst and synergistically decompose formaldehyde wallpaper and its preparation method, so as to solve the technical problem that the existing photocatalyst wallpaper decomposes formaldehyde with low efficiency

Method used

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  • Wallpaper for photocatalytic synergistic decomposition of formaldehyde and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing wallpaper for photocatalytic and synergistic decomposition of formaldehyde, comprising the steps of:

[0029] (1) Preparation of amino-modified diatomite:

[0030]Place the diatom mud in a muffle furnace for calcination at 500°C for 1 hour, and after cooling, use 20 wt% sulfuric acid to sonicate for 20 minutes, then settle, filter, wash, and vacuum-dry to obtain porous diatomite;

[0031] Add 100g of porous diatomaceous earth and 80g of hexamethylene diisocyanate into 500mL of anhydrous toluene solvent, ultrasonically disperse evenly, and then stir in an oil bath at 80°C for 6h under a nitrogen atmosphere. After the reaction is complete, put The reaction product is centrifuged, washed, and vacuum-dried to obtain isocyanated diatomite;

[0032] Add 100 g of isocyanated diatomite to 100 g of deionized water, and conduct a hydrolysis reaction at 80° C. for 36 hours. After the reaction, the reaction product is filtered, washed, and vacuum-dried to ob...

Embodiment 2

[0040] A method for preparing wallpaper for photocatalytic and synergistic decomposition of formaldehyde, comprising the steps of:

[0041] (1) Preparation of amino-modified diatomite:

[0042] Place diatom mud in a muffle furnace and calcinate at 550°C for 1.5h, after cooling, use 25wt% sulfuric acid to sonicate for 30min, then settle, filter, wash, and vacuum dry to obtain porous diatomite;

[0043] Add 100g of porous diatomaceous earth and 90g of hexamethylene diisocyanate into 500mL of anhydrous toluene solvent, ultrasonically disperse evenly, and then stir in an oil bath at 85°C for 6h under a nitrogen atmosphere. After the reaction is complete, put The reaction product is centrifuged, washed, and vacuum-dried to obtain isocyanated diatomite;

[0044] Add 100 g of isocyanated diatomite to 100 g of deionized water, and perform a hydrolysis reaction at 85° C. for 36 hours. After the reaction, the reaction product is filtered, washed, and vacuum-dried to obtain amino-modifi...

Embodiment 3

[0052] A method for preparing wallpaper for photocatalytic and synergistic decomposition of formaldehyde, comprising the steps of:

[0053] (1) Preparation of amino-modified diatomite:

[0054] Place diatom mud in a muffle furnace and calcinate at 580°C for 1.5h, after cooling, use 26wt% sulfuric acid to sonicate for 30min, then settle, filter, wash, and vacuum dry to obtain porous diatomite;

[0055] Add 100g of porous diatomaceous earth and 95g of hexamethylene diisocyanate into 500mL of anhydrous toluene solvent, ultrasonically disperse evenly, and then stir in an oil bath at 90°C for 6h under a nitrogen atmosphere. After the reaction is complete, put The reaction product is centrifuged, washed, and vacuum-dried to obtain isocyanated diatomite;

[0056] Add 100 g of isocyanated diatomite to 105 g of deionized water, and perform a hydrolysis reaction at 90° C. for 42 hours. After the reaction, the reaction product is filtered, washed, and vacuum-dried to obtain amino-modifi...

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Abstract

The invention discloses wallpaper for photocatalytic synergistic decomposition of formaldehyde and a preparation method thereof. The preparation method comprises the three steps of preparing amino-modified diatomite, preparing a g-C3N4-rGO catalyst loaded with MnO2 and preparing the wallpaper for photocatalytic synergistic decomposition of formaldehyde. In the g-C3N4-rGO catalyst loaded with MnO2, rGO can capture electrons of g-C3N4, and the photo-induced electron-hole pair is effectively separated, so that the formaldehyde decomposition is promoted, the formaldehyde decomposition performance is improved, the formaldehyde and the hydroxyl group on the MnO2 surface form the hydrogen bond so as to be adsorbed on the MnO2 surface when the illumination is weak and the night, and then the active oxygen on the MnO2 surface sequentially oxidizes the formaldehyde into formate, carbonate and CO2; after surface active oxygen is consumed for formaldehyde oxidation, oxygen vacancies are formed on the surface of MnO2, and then MnO2 adsorbs oxygen molecules in air and is decomposed into new active oxygen; and in addition, when illumination is strong, the MnO2 and g-C3N4-rGO can also form synergistic catalysis, and the catalytic performance is further improved.

Description

technical field [0001] The invention relates to the technical field of wallpaper preparation, in particular to a wallpaper for photocatalytic and synergistic decomposition of formaldehyde and a preparation method. Background technique [0002] Wallpaper is a material used to decorate interior walls. It is popular for its unique style and decorative and beautifying effects. So far, wallpaper has become an important interior wall decoration material just like paint. The domestic wallpaper market is constantly growing. Expansion, with the development trend of alternative coatings, in foreign countries, 90% of interior decoration uses wallpaper, so the domestic and foreign markets are very huge. [0003] With the continuous improvement of people's living standards, more and more attention is paid to the indoor living environment and quality. Formaldehyde, as the most common harmful substance in the indoor environment, is usually released by home decoration materials, and the rel...

Claims

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Application Information

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IPC IPC(8): D21H27/20D21H19/40D21H19/64D21H19/58D21H19/52D21H21/14B01D53/86
CPCD21H27/20D21H19/40D21H19/64D21H19/58D21H19/52D21H21/14B01D53/8668B01D2257/708B01D2255/2073B01D2255/70Y02P70/10
Inventor 任嵬李鹏龙杰吴苏州
Owner 上海威泽装饰材料有限公司
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