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Method for preparing porous titanium dioxide photocatalysis film with non-hydrolyzed sol-gel method

A technology of porous titanium dioxide and photocatalytic film, which can be applied in chemical instruments and methods, physical/chemical process catalyst, chemical/physical process, etc., and can solve the problems of unreported photocatalytic film

Inactive Publication Date: 2007-10-17
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the prepared TiO 2 Research on photocatalytic thin films has not been reported yet

Method used

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  • Method for preparing porous titanium dioxide photocatalysis film with non-hydrolyzed sol-gel method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In a fume hood, measure the required amount of absolute ethanol into a dry jar, place it in a cold water bath, use a pipette to transfer a certain amount of titanium tetrachloride and slowly mix with the ethanol, and stir thoroughly. Form TiCl 4 The ethanol solution has a molar concentration of 0.83mol / L. The ethanol solution of titanium tetrachloride was sealed and placed in an oven at 50°C for 24 hours, and then polyethylene glycol with a molecular weight of 1000 was added under stirring conditions, and the mixture was thoroughly stirred and mixed. The molar ratio of PEG1000 and titanium tetrachloride The ratio is 0.10, and finally the precursor sol is obtained and sealed and stored. At room temperature, in a dry environment, the immersion pulling method is used to coat the substrate with a pulling speed of 1mm / s, and then the film obtained by pulling is placed in an oven at 80°C for 2 hours to form TiO 2 Dry gel film. The dry gel film is calcined in an air atmosphere, th...

Embodiment 2

[0021] In a fume hood, measure the required amount of anhydrous isopropanol into a dry jar, place it in a cold water bath, use a pipette to transfer a certain amount of titanium tetrachloride and slowly mix with isopropanol , Stir fully to form TiCl 4 The isopropanol solution has a molar concentration of 0.43mol / L. The titanium tetrachloride isopropanol solution was sealed and placed in an oven at 45°C for 24 hours, and then a polyethylene glycol with a molecular weight of 600 was added under stirring conditions, and the mixture was thoroughly mixed. Among them, PEG600 and titanium tetrachloride The molar ratio is 0.20, and finally the precursor sol is obtained and sealed and stored. At room temperature, in a dry environment, the immersion pulling method is used to coat the substrate with a pulling speed of 1mm / s, and then the film obtained by pulling is placed in an oven at 80°C for 2 hours to form TiO 2 Dry gel film. Finally, the dry gel film is calcined in an air atmosphere wit...

Embodiment 3

[0023] In a fume hood, measure the required amount of anhydrous methanol into a dry jar, place it in a cold water bath, use a pipette to take a certain amount of titanium tetrachloride and slowly mix with methanol, and stir thoroughly. Form TiCl 4 The methanol solution has a molar concentration of 1.19mol / L. The methanol solution of titanium tetrachloride was sealed and placed in an oven at 55°C for 24 hours, and then polyethylene glycol with a molecular weight of 2000 was added under stirring conditions. The mixture was thoroughly stirred and mixed evenly. The molar ratio of PEG2000 and titanium tetrachloride The ratio is 0.02, and finally the precursor sol is obtained and sealed and stored. In a dry environment at room temperature, the dipping and pulling method is used to coat the substrate with a pulling speed of 1mm / s, and then the film obtained by pulling is placed in an oven at 80°C for 2 hours to form TiO 2 Dry gel film. The dry gel film is calcined in an air atmosphere, a...

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Abstract

The invention discloses a method for preparing a porous titania photocatalysis film by a non-hydrolyzed sol-gel process, including the following steps of: mixing titanium tetrachloride and anhydrous lower alcohol as main materials into TiCl4 alcoholic solution, adding polyethylene glycol after aging the solution for 24 hours at the temperature of 45-65 DEG C. to form a transparent precursory sol; filming the preprocessed substrate material in a drying environment by a dip-coating method, then drying and calcining to form the porous titania photocatalysis film of the invention. Compared with a traditional sol-gel process, the porous titania photocatalysis film prepared by the method of the invention has advantages of simple process, operation convenience and low cost.

Description

Technical field [0001] The invention relates to a method for preparing a porous titanium dioxide photocatalytic film by a non-hydrolysis sol-gel method, and belongs to the technical field of chemistry and chemical engineering. Background technique [0002] TiO 2 The film has excellent photocatalytic and hydrophilic properties, and has broad application prospects in environmental treatment. TiO currently prepared 2 The thin film methods mainly include chemical vapor deposition, liquid deposition, magnetron sputtering and sol-gel methods. The most commonly used method is the sol-gel method, which has the advantages of high purity and accurate control of the stoichiometric ratio. Preparation of TiO by existing sol-gel method 2 The films are all traditional hydrolyzed sol-gel methods, most of which use titanium alkoxides (such as butyl titanate) as precursors, the raw materials are expensive, and chelating agents need to be added to control the excessively f...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 江伟辉包镇红周健儿顾幸勇朱小平
Owner JINGDEZHEN CERAMIC INSTITUTE
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