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Preparation method of visible light response water-based photocatalytic spray coating slurry

A visible light and photocatalytic technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of inapplicability, limited application range, poor stability, etc., and achieve good photocatalytic performance and promote Popular application, excellent adhesion effect

Active Publication Date: 2014-03-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently on the market nano TiO 2 The product is mainly nano TiO 2 Powder dispersion system, most of these systems have poor stability and photocatalytic performance is seriously reduced compared with powder due to the use of various polymer organic dispersion stabilizers for surface modification
The most important thing is that most of these products are basically unable to be used in daily life space because they can only function under ultraviolet light, and the application range is very limited

Method used

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  • Preparation method of visible light response water-based photocatalytic spray coating slurry
  • Preparation method of visible light response water-based photocatalytic spray coating slurry
  • Preparation method of visible light response water-based photocatalytic spray coating slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0021] First, 800 parts by weight of water, 0.1 parts by weight of sodium disilicate as a wetting and dispersing agent, and 10 parts by weight of bentonite as a thickening and dispersing agent were stirred at high speed for 30 minutes to obtain a dispersion, and then the chromium-nitrogen co-doped nano-titanium dioxide powder was weighed according to 4 The proportion of parts by weight is dispersed in a certain amount of pre-stirred dispersion liquid under the condition of high-speed stirring to obtain a mixture. Put the above-mentioned mixture into a sand mill for 2 hours, then add 50 parts by weight of alumina sol, an effective bonding film-forming component, continue sanding for 30 minutes, and then carry out degassing and stirring for 1 hour to obtain visible light response nano-titanium dioxide photocatalytic spraying for spraying. slurry.

Embodiment 2

[0023] First, 1000 parts by weight of water, 1 part by weight of sodium hexametaphosphate as a wetting and dispersing agent, and 30 parts by weight of sepiolite as a thickening and dispersing agent were stirred at high speed for 30 minutes to obtain a dispersion. The iron-nitrogen co-doped nano-titanium dioxide powder responding to visible light is weighed and dispersed in a certain amount of pre-stirred dispersion liquid under the condition of high-speed stirring in a proportion of 300 parts by weight to obtain a mixture. Put the above-mentioned mixture into a sand mill for 12 hours, then add 200 parts by weight of silica sol, an effective bonding film-forming component, continue sanding for 30 minutes, and then carry out defoaming and stirring for 1 hour to obtain visible light-responsive nano-titanium dioxide photocatalytic spraying for spraying. slurry.

Embodiment 3

[0025] First, 900 parts by weight of water, 3 parts by weight of wetting and dispersing agent (sodium disilicate: trisodium phosphate = 1:1), 60 parts by weight of thickening and dispersing agent (bentonite:: hectorite = 1:2) were mixed at high speed After stirring for 30 min, a dispersion was obtained. The chromium-doped nano-titanium dioxide powder that responds to visible light is weighed and dispersed in a certain amount of pre-stirred dispersion liquid under the condition of high-speed stirring in a proportion of 1000 parts by weight to obtain a mixture. Put the above mixture into a sand mill for 12 hours, then add 300 parts by weight of effective bonding and film-forming components (alumina sol: titanium dioxide sol = 1:1), continue sanding for 30 minutes, then defoam and stir for 1 hour to obtain Visible light-responsive nano-titanium dioxide photocatalytic spray coating slurry for spraying.

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Abstract

A preparation method of visible light response water-based photocatalysis spray coating slurry belongs to the field of inorganic materials and includes stirring 800-1000 parts by weight of water, 0.1 part to 3 parts by weight of wetting dispersing agent and 10 to 100 parts by weight of thickening dispersing agent for 30min to obtain dispersing liquid at high speed, weighing 4 to 1000 parts by weight of visible light response nanometer titanium dioxide powder, dispersing the powder under the high speed stirring condition into a certain amount of dispersing liquid which is stirred evenly in advance to obtain a mixed material, placing the mixed material into a sand mill to conduct sand milling for 2 to 12 hours, then adding 50 to 300 parts by weight of effective bonding film formation components, continuously conducting sand milling for 30min, then conducting defoaming stirring for 1 hour to obtain titanium dioxide photocatalysis spray coating slurry for spray coating. The photocatalysis spray coating slurry prepared by the method is suitable for spray coating and excellent in adhesion, has good photocatalysis performance, is capable of being applied to the fields of indoor air purification, antibiosis deodorization, sewage treatment and the like after spray coating loading, and is favorable for improving popularization and application of titanium dioxide catalyst materials.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and relates to a preparation method of a visible light-responsive nano-titanium dioxide photocatalytic spray coating slurry used in the field of environmental protection. Background technique [0002] TiO 2 Photocatalytic environmental purification materials can be widely used in sewage treatment, air purification, antibacterial deodorization, anti-fog self-cleaning and other fields because they can convert light energy into chemical energy. However, the vast majority of TiO 2 Environmental purification materials can only function under ultraviolet light irradiation, which greatly limits the photocatalytic efficiency and application fields of such materials. In order to solve TiO 2 The limitations of photocatalytic environmental purification materials on the dependence of ultraviolet rays, and the preparation of TiO with high-efficiency visible light activity 2 Environmental purification m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02
Inventor 曹文斌刘文秀许军娜邵威娜
Owner UNIV OF SCI & TECH BEIJING
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