Method of preparing composite photocatalytic material for air purification

A composite photocatalysis and air purification 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 low photocatalytic efficiency, poor adsorption capacity, weak bonding between titanium dioxide and the carrier, etc. Problems, to achieve the effect of uniform compounding, improved adhesion, and improved photocatalytic efficiency

Inactive Publication Date: 2006-11-08
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the poor adsorption capacity of titanium dioxide, weak bond between titanium dioxide and the carrier, and low photocatalytic efficiency, and provide a preparation method that makes the bond between titanium dioxide and the carrier firm, and improves the adsorption capacity and photocatalytic efficiency. Composite Photocatalytic Materials for Catalytic Efficiency in Air Purification

Method used

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  • Method of preparing composite photocatalytic material for air purification
  • Method of preparing composite photocatalytic material for air purification
  • Method of preparing composite photocatalytic material for air purification

Examples

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Embodiment 1

[0021] Preparation of titanium dioxide / activated carbon composite air purification material from sol

[0022] Add 0.1mol (34g) tetrabutyl titanate dropwise to 360ml, 1M aqueous nitric acid solution under stirring at room temperature, drop and stir while controlling the dropping and stirring speed, continue stirring for 2 hours after dropping, tetrabutyl titanate The ester is hydrolyzed to form a slightly light yellow transparent sol. After standing for several hours, the decomposed butanol is layered with the sol and floats on the upper layer in light yellow color. The butanol layer is separated with a separatory funnel to obtain a nearly colorless sol . Add 3 g of 200-mesh activated carbon powder to the prepared sol and put it into a pressure-resistant container. After hydrothermal treatment at 160° C. for 10 hours, a suspension of titanium dioxide / activated carbon composite catalyst is obtained. Combined with the papermaking process, spraying is carried out before the paper...

Embodiment 2

[0024] Preparation of titanium dioxide / activated carbon composite air purification material from titanium dioxide powder

[0025] Add 8g of nano-titanium dioxide powder to 340mL of water, and ultrasonically disperse for 20min to obtain a white suspension. Add 3 g of 200-mesh activated carbon powder into a pressure-resistant container, and after hydrothermal treatment at 160° C. for 5 hours, a suspension of titanium dioxide / activated carbon composite catalyst is obtained. The same operation as in Example 1 was carried out later to obtain Sample 2.

Embodiment 3

[0027] Titanium dioxide air purification material prepared from sol

[0028] Titanium dioxide sol was prepared by the same method as in Example 1, and sample 3 was obtained in subsequent steps without adding activated carbon.

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Abstract

The invention discloses a preparation method of a photocatalytic purification composite material for purifying air. The method uses titanate as raw material to prepare titanium dioxide sol by sol-gel method, or ultrasonically disperses nano titanium dioxide powder in water to prepare titanium dioxide suspension, and then adds activated carbon for hydrothermal treatment to prepare a suspension containing titanium dioxide / activated carbon composite catalyst; and then Combined with the papermaking process, it is sprayed on the paper before the paper drying section, dried, and pressed into a corrugated shape to prepare an adsorption-type composite photocatalytic purification material with titanium dioxide as the main catalyst, activated carbon as the carrier, and paper as the support. The material of the present invention converts common volatile organic pollutants in the air into harmless products through photocatalytic reaction in a closed or semi-closed space, irradiated by ultraviolet light.

Description

Technical field [0001] The technical field of the invention is air pollution control technology, in particular, it belongs to a preparation method of a composite photocatalytic material for air purification. Background technique [0002] In recent years, nano-semiconductor photocatalytic technology has made great progress, many nano-semiconductor materials, such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), tin dioxide (SnO 2 ), cadmium sulfide (CdS), etc. have been found to effectively degrade organic or inorganic pollutants, among which titanium dioxide has the advantages of stable chemical properties, strong redox, anti-corrosion of photocathode, insoluble, non-toxic, and low cost. The literature on the degradation of pollutants using titanium dioxide as a photocatalyst includes Alberici R.M., Jardim W.F. "Photocatalytic destruction of VOCs in the gas-phase using Titanium Dioxide" published in "Applied Catalysis". .Appl.Catal.B: Environ, 1997, 14, 55~68), most of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J37/02
Inventor 张建臣郭坤敏
Owner NO 63971 TROOPS PLA
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