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Method for preparing hydrophilic titanium dioxide nano film

A titanium dioxide, nano-film technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of unsatisfactory hydrophilic performance of the film, difficult practical application, etc. Effect

Inactive Publication Date: 2008-05-21
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, visible light contains a small amount of ultraviolet rays, and the hydrophilic performance of the film under visible light irradiation is not satisfactory, which brings difficulties to practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with embodiment, but should not limit protection scope of the present invention with this.

[0021] Take 100ml of tetrabutyl titanate, add 900ml of absolute ethanol and magnetically stir for 30 minutes, add 1ml of ammonia water and 0.3ml of hydrochloric acid, and then magnetically stir for 2 hours. After a period of stability, a uniform and transparent sol can be obtained;

[0022] Apply the sol to the glass surface by dip coating, put the clean glass vertically into the sol, then pull it up vertically at a constant speed, and dry it into a gel film at room temperature;

[0023] The film is dried at 250°C, then placed in a resistance furnace and heated to 600°C at a heating rate of 2°C / min and kept for 1 hour, and then cooled to room temperature with the furnace, and the corresponding film can be obtained on the glass surface.

[0024] According to the above steps: film coating, drying and heat preserv...

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Abstract

The invention relates to a preparation method of a hydrophilic titanium dioxide nano-film, which is characterized in that ammonia is added during the preparation process of the titanium dioxide nano-film. The method comprises the following steps: (1) raw material proportioning; (2) burdening: the raw materials proportioning is selected and a certain amount of the materials are weighted to be made into sol; (3) film painting: the sol is painted on the surface of hardened substance; (4) thermal treatment: the sintering is carried out under the temperature of 600 DEG C to 1000 DEG C with the sintering time of 0.5-3 hours so as to obtain the hydrophilic titanium dioxide nano-film. The invention changes the structure, surface morphology and surface defect degree of nanometer semiconductors so as to improve the visible light absorption within the forbidden bandwidth; in addition, the test indicates that the hydrophilicity of the titanium dioxide nano-film is significantly improved.

Description

technical field [0001] The present invention relates to titanium dioxide (chemical formula is TiO 2 ) film, especially a method for preparing a hydrophilic titanium dioxide nano film under the action of visible light. Background technique [0002] The surface of titanium dioxide film has two functions of photocatalytic degradation of organic pollutants and hydrophilicity, and can maintain TiO2 under ultraviolet irradiation. 2 The hydrophilic property of the film, so the surface of glass such as windows and mirrors is coated with TiO 2 The film can play a transparent, anti-fog and self-cleaning effect. [0003] But TiO 2 The film needs to be irradiated with ultraviolet rays to have photocatalytic activity and hydrophilicity, and the hydrophilic angle quickly becomes larger and spreads to play a role of transparency and self-cleaning. However, visible light contains a small amount of ultraviolet rays, and the hydrophilic performance of the film under visible light irradiat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C03C17/23C04B41/85
Inventor 关凯书王伟李建卫
Owner EAST CHINA UNIV OF SCI & TECH
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