SiO2/TiO2 composite nanometer photocatalysis membrane for treating indoor light pollution air and preparing method thereof

A micro-pollution, treatment chamber technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve problems such as low catalytic effect and no fundamental elimination of pollutants

Inactive Publication Date: 2005-02-23
鞍山市环境保护研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all have a common shortcoming: they only transfer pollutants from one phase to another, and do not eliminate pollutants fundamentally.
The catalytic effect of this method is relatively low. It takes 60 minutes to degrade 250ppm formaldehyde at a relative humidity of 40% and a temperature of 22°C.

Method used

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  • SiO2/TiO2 composite nanometer photocatalysis membrane for treating indoor light pollution air and preparing method thereof
  • SiO2/TiO2 composite nanometer photocatalysis membrane for treating indoor light pollution air and preparing method thereof
  • SiO2/TiO2 composite nanometer photocatalysis membrane for treating indoor light pollution air and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] SiO 2 / TiO 2 The preparation method of catalytic membrane is described as follows:

[0052] Put 70ml of diethanolamine into 700ml of absolute ethanol, then add 0.24ml of ethyl orthosilicate, stir for 2 hours, then add 170ml of tetrabutyl titanate, continue stirring for 2 hours, add dropwise a mixed solution of 100ml of absolute ethanol and 36ml of water After stirring for two hours, 4 g of polyethylene glycol 2000 was added, ultrasonically oscillated for 30 min, and aged for one week. Put the glass fiber into hydrochloric acid, sodium hydroxide and acetone and ultrasonically clean it for 5 minutes.

[0053] Put the treated glass fiber into the aged sol, pull it at a speed of 1.8mm / min, and dry it at 100°C. Repeat fourteen times. Finally, the coated film was baked at 500°C for 1 hour, and cooled to room temperature naturally.

Embodiment 2

[0055] Take 50ml of diethanolamine and put it into 254ml of absolute ethanol, then add 11.8ml of ethyl orthosilicate, stir for 2h, then add 170ml of tetrabutyl titanate, continue stirring for 2h, add dropwise the mixed solution of 100ml of absolute ethanol and 27ml of water After stirring for two hours, 12 g of polyethylene glycol 2000 was added, ultrasonically oscillated for 30 min, and aged for one week. Put the glass fiber into hydrochloric acid, sodium hydroxide and acetone and ultrasonically clean it for 5 minutes.

[0056] Put the treated glass fiber into the aged sol, pull it at a speed of 1.8mm / min, and dry it at 100°C. Repeat fourteen times. Finally, the coated film was baked at 500°C for 1 hour, and cooled to room temperature naturally.

Embodiment 3

[0058] Put 100ml of diethanolamine into 772ml of absolute ethanol, then add 6ml of ethyl orthosilicate, stir for 2h, then add 170ml of tetrabutyl titanate, continue stirring for 2h, add dropwise a mixed solution of 100ml of absolute ethanol and 9ml of water, After stirring for two hours, 10 g of polyethylene glycol 2000 was added, ultrasonically oscillated for 30 min, and aged for one week. Put the glass fiber into hydrochloric acid, sodium hydroxide and acetone and ultrasonically clean it for 5 minutes.

[0059] Put the treated glass fiber into the aged sol, pull it at a speed of 1.8mm / min, and dry it at 100°C. Repeat fourteen times. Finally, the coated film was baked at 500°C for 1 hour, and cooled to room temperature naturally.

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Abstract

A composite nano-SiO2/TiO2 membrane as photocatalyst for treating the slightly polluted indoor air is prepared by sol-gel method, which includes such steps as preparing sol, immersing the treated glass fibres in it, pulling up, drying and calcining.

Description

technical field [0001] The invention relates to SiO for treating indoor slightly polluted air 2 / TiO 2 The composite nanometer photocatalytic film and its preparation method can be effectively used for the treatment of indoor formaldehyde and other micro-polluting organic gases, and belong to the field of waste gas treatment. Background technique [0002] According to expert surveys, modern people spend 90% of their time living and working indoors, and 65% of their time at home. And the degree of indoor air pollution in modern cities is many times higher than outdoors! Therefore, the problem of indoor air pollution, which has a great impact on the health of modern people, should arouse people's attention. Indoor micro-polluted air is mainly formaldehyde, benzene series and so on. These pollutants mainly come from newly renovated houses. They slowly volatilize from the materials used in the decoration into the surrounding air, making the room still smell after half a year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/86B01J21/06
Inventor 回滨全燮詹天珍田地诸献雨刘兆阳王凤岩
Owner 鞍山市环境保护研究所
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