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Nitrogen-doped titania/silica photocatalytic coating supported by diatomite

A technology of diatomite and photocatalysis, applied in physical/chemical process catalysts, chemical/physical processes, coatings, etc., can solve the problems of poor dispersion and low efficiency of decomposing harmful gases in the room, and achieve improved dispersion and degradation process Irreversible, life-prolonging effect

Active Publication Date: 2020-01-10
福建宸琦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that the existing titanium dioxide photocatalytic coatings are difficult to carry out photocatalytic activities under visible light irradiation, the photogenerated electron-hole pairs are easy to recombine, and titanium dioxide is easy to agglomerate in the coating and has poor dispersion, which leads to the problem of low efficiency of decomposing harmful gases in the chamber , providing a diatomaceous earth supported N-TiO 2 / SiO 2 Photocatalytic coating and preparation method thereof

Method used

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  • Nitrogen-doped titania/silica photocatalytic coating supported by diatomite
  • Nitrogen-doped titania/silica photocatalytic coating supported by diatomite
  • Nitrogen-doped titania/silica photocatalytic coating supported by diatomite

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Experimental program
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Effect test

Embodiment 1

[0030] A diatomaceous earth loaded N-TiO 2 / SiO 2 Photocatalytic coating, in parts by weight, its raw material composition is: 25 parts of water, diatomaceous earth load N-TiO 2 / SiO 2 18 parts, Ca(OH) 2 2.5 parts, wollastonite powder 7.5 parts, redispersible rubber powder 2.5 parts, bentonite 2.5 parts, dispersant 1.5 parts, curing agent 1 part, defoamer 0.8 parts.

[0031] The diatomaceous earth supported N-TiO 2 / SiO 2 Preparation of:

[0032] (1) Dissolve 3ml of titanium isopropoxide in 21ml of ethylene glycol and stir magnetically for 4 hours to obtain solution A; mix 0.5g of cetyltrimethylammonium bromide, 0.25g of urea, 15ml of 5mol / L nitric acid solution, 2.5 Dissolve ml tetraethyl orthosilicate in ethanol, and stir magnetically for 30 minutes to obtain solution B; drop solution A into solution B and mix evenly, then transfer it to a stainless steel hydrothermal synthesis reactor with a polytetrafluoroethylene liner and react at 150°C for 10 hours After cooling ...

Embodiment 2

[0037] A diatomaceous earth loaded N-TiO 2 / SiO 2 The photocatalytic coating, in parts by weight, consists of raw materials: 30 parts of water, diatomaceous earth loaded N-TiO 2 / SiO 2 16 parts, Ca(OH) 2 2.5 parts, 2.5 parts of redispersible rubber powder, 7.5 parts of wollastonite powder, 2.5 parts of bentonite, 1 part of dispersant, 1 part of curing agent, and 0.8 part of defoamer.

[0038] The diatomaceous earth supported N-TiO 2 / SiO 2 Preparation of:

[0039] (1) Dissolve 3ml of titanium isopropoxide in 21ml of ethylene glycol and stir magnetically for 4 hours to obtain solution A; mix 0.5g of cetyltrimethylammonium bromide, 0.25g of urea, 15ml of 5mol / L nitric acid solution, 2.5 Dissolve ml tetraethyl orthosilicate in ethanol, and stir magnetically for 30 minutes to obtain solution B; drop solution A into solution B and mix evenly, then transfer it to a stainless steel hydrothermal synthesis reactor with a polytetrafluoroethylene liner and react at 130°C for 10 hou...

Embodiment 3

[0044] A diatomaceous earth loaded N-TiO 2 / SiO 2 Photocatalytic coating, in parts by weight, its raw material composition is: 25 parts of water, diatomaceous earth load N-TiO 2 / SiO 2 20 parts, wollastonite powder 7.5 parts, Ca(OH) 2 2.5 parts, 2 parts of redispersible rubber powder, 2.5 parts of bentonite, 1.5 parts of dispersant, 1 part of curing agent, 0.8 part of defoamer.

[0045] The diatomaceous earth supported N-TiO 2 / SiO 2 Preparation of:

[0046] (1) Dissolve 3ml of titanium isopropoxide in 21ml of ethylene glycol and stir magnetically for 4 hours to obtain solution A; mix 0.5g of cetyltrimethylammonium bromide, 0.8ml of ammonia water, 15ml of 5mol / L nitric acid solution, 3ml Dissolve ethyl orthosilicate in ethanol, and stir magnetically for 30 minutes to obtain solution B; drop solution A into solution B and mix evenly, then transfer it to a stainless steel hydrothermal synthesis reactor with a polytetrafluoroethylene liner and react at 170°C for 10 hours; ...

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Abstract

The invention discloses a diatomite-loaded nitrogen-doped titanium dioxide / silica photocatalytic coating, which belongs to the field of chemical coatings. The coating includes the following ingredients: water, diatomite loaded N-TiO 2 / SiO 2 , wollastonite powder, Ca(OH) 2 , rubber powder, bentonite, dispersant, curing agent and defoaming agent. The present invention prepares N-TiO 2 / SiO 2 composite material and loaded in diatomaceous earth, TiO 2 The photoresponse range extends from the ultraviolet region before doping to the visible region, protecting TiO 2 Photocatalytic activity also improved by pure nano-TiO 2 The shortcomings of easy agglomeration, easy recombination of photogenerated electron-hole pairs, small particle size with large specific surface area and easy falling off in coatings; and improved N-TiO 2 / SiO 2 Dispersion in coatings inhibits TiO 2 The deactivation of photocatalytic performance prolongs its service life in coatings and increases the loading rate, which has good application prospects.

Description

technical field [0001] The invention belongs to the field of chemical coatings, in particular to a diatomite-loaded nitrogen-doped titanium dioxide / silicon dioxide photocatalytic coating. Background technique [0002] Indoor pollution is the third generation of pollution after humans have experienced soot pollution and photochemical smog pollution. In my country's newly renovated houses, the air quality pass rate is less than 20%, and the main reason is that harmful pollutants such as wall materials, building decoration materials, and various furniture and floors exceed the standard. These harmful substances mainly include radon, ammonia, Benzene, formaldehyde and other volatile organic compounds (VOCs), among which formaldehyde has the most content and is the most harmful. Therefore, in recent years, the key direction of structural adjustment of wall building materials industry is to encourage the production of environment-friendly and resource-saving materials, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/65C09D7/61B01D53/86B01D53/72B01D53/00B01J21/06
CPCB01D53/007B01D53/86B01D53/8668C09D1/00B01J21/06B01D2259/80B01D2255/802B01D2258/06B01D2257/708B01D2257/704B01J35/39
Inventor 郑玉婴林卓哲
Owner 福建宸琦新材料科技有限公司
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