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Preparation method of efficient photocatalytic self-cleaning glass

A photocatalytic and self-cleaning technology, applied in coatings and other directions, can solve the problems of low catalytic efficiency of titanium dioxide, failure to meet self-cleaning requirements, poor hydrophilicity of titanium dioxide, etc., to improve photocatalytic efficiency, increase surface acidity, and accelerate light. The effect of catalytic reaction

Inactive Publication Date: 2018-06-12
吕莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a high-efficiency photocatalytic self-cleaning glass preparation method for the defects of low catalytic efficiency of the photocatalyst titanium dioxide and poor hydrophilicity of titanium dioxide in the self-cleaning glass, which cannot meet the self-cleaning requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027]Add 50mL of absolute ethanol into 6mL tetraethyl orthosilicate along the wall of the beaker, stir for 10min, add 3mL of water into the beaker, stir for 10min, then add 15% hydrochloric acid to the beaker to adjust the pH of the solution in the beaker to 1.8 , standing for 3 hours to obtain silica sol; put 60mL of absolute ethanol in a three-necked flask with a stirrer and a dropping funnel, and add 18mL of titanium tetrabutyl titanate, start the stirrer at the same time, and start stirring at a speed of 200r / min. After the tetrabutyl titanate is added dropwise, add 4mL triethanolamine to the three-necked flask and stir for 1h to obtain a uniform solution; 1mL water, 8mL Mix absolute ethanol and 2mL of hydrochloric acid with a mass fraction of 20%, pour it into the above-mentioned three-necked flask, continue to stir and mix for 2h, and then let it stand for 5h to obtain a light yellow titanium dioxide sol, and then add 1mL of polycarbonate with a molecular weight of 2000 ...

example 2

[0029] Add 55 mL of absolute ethanol into 7 mL of tetraethyl orthosilicate along the wall of the beaker, stir for 13 min, add 3.5 mL of water into the beaker, stir for 11 min, then add 15% hydrochloric acid to the beaker to adjust the pH of the solution in the beaker to 2.0, stand still for 3.5h to obtain silica sol; place 65mL of absolute ethanol in a three-necked flask with a stirrer and a dropping funnel, and use the dropping funnel to drop it into the three-necked flask at a rate of 2.5mL / min. Add 19 mL of tetrabutyl titanate, start the stirrer at the same time, and start stirring at a speed of 250 r / min. After the tetrabutyl titanate is added dropwise, add 5 mL of triethanolamine to the three-necked flask and stir for 1.5 hours to obtain a uniform solution; 1.5mL of water, 9mL of absolute ethanol, and 3mL of hydrochloric acid with a mass fraction of 20% were mixed, poured into the above-mentioned three-necked flask, continued to stir and mix for 2.5h, and then stood still ...

example 3

[0031] Add 60mL of absolute ethanol into 8mL tetraethyl orthosilicate along the wall of the beaker, stir for 15min, add 4mL of water into the beaker, stir for 12min, then add hydrochloric acid with a mass fraction of 15% to the beaker to adjust the pH of the solution in the beaker to 2.2 , standing for 4h to obtain silica sol; put 70mL of absolute ethanol in a three-necked flask with a stirrer and a dropping funnel, and add 20mL of titanium tetrabutyl titanate, start the stirrer at the same time, and start stirring at a speed of 300r / min. After the tetrabutyl titanate is added dropwise, add 6mL triethanolamine to the three-necked flask and stir for 2 hours to obtain a uniform solution; mix 2mL water, 10mL Mix absolute ethanol and 4 mL of hydrochloric acid with a mass fraction of 20%, pour it into the above-mentioned three-necked flask, continue to stir and mix for 3 hours, and then let it stand for 6 hours to obtain a light yellow titanium dioxide sol, and then add 3 mL of poly...

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Abstract

The invention relates to the technical field of glass material preparation, in particular to a preparation method of efficient photocatalytic self-cleaning glass. The preparation method comprises thefollowing steps: mixing butyl ester titanate and absolute ethyl alcohol; doping ferric chloride and polyvinyl alcohol under an acid condition; hydrolyzing to obtain titanium dioxide sol; coating a glass plate to obtain efficient photocatalytic self-cleaning glass, wherein iron ions are reacted with titanium dioxide, so that the photocatalytic efficiency of the titanium dioxide is increased; underthe action of titanium dioxide loaded with a layer of silicon dioxide film, increases the adsorption of to a degradation product is increased; stronger hydroxyl groups are formed on the surface, and block the combination of electron hole pairs to generate strongly oxidizing active hydroxy, so that the photocatalytic reaction rate is increased; the titanium dioxide is partially compounded with thesilicon dioxide, so that a film becomes rough, the adsorption performance is enhanced, the efficient photocatalytic self-cleaning glass can change from hydrophobic to hydrophilic quickly and keeps a smaller contact angle, and the hydrophilic property of the self-cleaning glass is improved; and the efficient photocatalytic self-cleaning glass has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of glass material preparation, in particular to a preparation method of high-efficiency photocatalytic self-cleaning glass. Background technique [0002] Glass is an indispensable part of our daily life. While the extensive use of glass brings light and beauty to people, it also brings many problems to people, such as: cleaning problems, rain and fog problems, etc. After long-term use of glass, the surface will be contaminated with a lot of dust and oil, which requires a lot of manpower and material resources to clean. Therefore, self-cleaning glass came into being. [0003] Self-cleaning glass refers to a new glass coated with a transparent titanium dioxide photocatalyst film on the surface of flat glass. When this titanium dioxide photocatalyst called "photocatalyst" encounters sunlight, fluorescent lamps, and ultraviolet rays, it will turn organic matter and pollutants attached to the surface into CO in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34
CPCC03C17/3417C03C2217/213C03C2217/24C03C2217/71C03C2218/113
Inventor 徐炜何少雄张建初
Owner 吕莉
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