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Method for preparing load type titanium dioxide photocatalytic film

A photocatalytic thin film, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of firm adhesion, long service life, and constant degradation rate

Inactive Publication Date: 2009-06-03
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a loaded titanium dioxide photocatalytic film with firm adhesion, not easy to fall off, high photocatalytic activity and stability, and long service life, so as to solve the defects and problems in the above-mentioned prior art

Method used

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  • Method for preparing load type titanium dioxide photocatalytic film
  • Method for preparing load type titanium dioxide photocatalytic film
  • Method for preparing load type titanium dioxide photocatalytic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] a) Titanium dioxide sol preparation

[0026] Mix absolute ethanol and pure butyl titanate at a volume ratio of 4:1; adjust the pH to 3 with dilute nitric acid; stir at 25°C for 1 hour and then age in the dark for 24 hours;

[0027] b) Ultrasonic coating of titanium dioxide thin films

[0028] Immerse the surface-cleaned glass sheet in the titanium dioxide sol, and use ultrasonic waves to coat the carrier glass sheet with a titanium dioxide film at 25°C for 1 to 5 minutes;

[0029] c) dipping and pulling

[0030] At a speed of 1 mm / s, the carrier glass sheet that has been ultrasonically coated with a titanium dioxide film is pulled out from the sol at a uniform speed;

[0031] d) dry calcination

[0032] First, let it dry naturally at room temperature, then place it in an oven and dry it at 105°C for 0.5 hours, and finally calcinate it at 480°C for 1-2 hours, and after natural cooling, you can get a titanium dioxide photocatalytic film loaded on the surface of the gla...

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Abstract

The invention discloses a method for preparing a load type titanium dioxide photocatalytic film. The method comprises titanium dioxide sol preparation, titanium dioxide film coating by ultrasonic, dipping and pulling, and drying and calcining. As the method organically combines technology of sol-gel, ultrasonic coated film and dipping and pulling, the load type titanium dioxide photocatalytic film prepared by the method has an even and compact surface, basically does not have shedding phenomenon after three times of acid dipping and ultrasonic oscillating cleaning during a process of 200 hours use, and the photocatalytic efficiency of the film after cleaning is basically not changed. The load type titanium dioxide photocatalytic film has the advantages of stable photocatalytic property, basically invariable degradation velocity, firm attachment, difficult fall-off, high photocatalytic activity and stability and long service life.

Description

technical field [0001] The invention relates to a preparation method of a loaded titanium dioxide photocatalytic film, belonging to the technical field of photocatalytic material preparation. Background technique [0002] Titanium dioxide (TiO 2 ) photocatalytic oxidation method can effectively remove toxic and harmful substances in air and water without secondary pollution. It is an environmentally friendly catalytic purification technology in the 21st century. One of the most active areas of research abroad. Due to the shortcomings of powder titanium dioxide photocatalyst in use, such as easy deactivation, easy aggregation, and difficulty in recycling, it is not conducive to the promotion and use of industrialization; while the supported titanium dioxide film has the advantages of easy operation and controllability, and has good theoretical research and development. practical application value. [0003] Currently, methods for preparing supported titanium dioxide films i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/02C03C17/23
Inventor 阎宁张永明杨燕孙霞
Owner SHANGHAI NORMAL UNIVERSITY
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