A kind of preparation method of titanium dioxide photocatalyst coating

A technology of titanium dioxide and photocatalyst, applied in the direction of coating, layered products, etc., can solve the problems of poor film adhesion, affect the photocatalytic properties of TiO2, shorten the service life, etc., achieve strong self-cleaning ability, long service life and low cost Effect

Active Publication Date: 2016-03-23
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current methods do not heat-treat the coating or only heat-treat it at a lower temperature, so the adhesion of the obtained film is poor, and other raw materials are added in the preparation process, which affects the TiO coating. 2 The photocatalytic properties make the service life shorter

Method used

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  • A kind of preparation method of titanium dioxide photocatalyst coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 5 grams of TiO 2 Add nanometer powder to 1L solution containing water, ethanol, and glacial acetic acid (the volume ratio of water: ethanol: glacial acetic acid is 1 / 1 / 0.1) and grind to obtain a uniform translucent suspension without precipitation.

[0023] (2) Apply the above-mentioned suspension to the surface of the cleaned glass by spraying to form a nanometer layer, and dry it under air conditions.

[0024] (3) heat-treat the substrate in the above step (2) at 400° C. for 10 h under air conditions, and then cool to room temperature to form a photocatalyst coating on the surface of the substrate. The obtained coating has a smooth surface, uniform thickness, good transparency, and a thickness of 300 nanometers.

Embodiment 2

[0026] (1) Weigh 5 grams of metatitanic acid, add 1L of water, ethanol, glacial acetic acid (the volume ratio of water: ethanol: glacial acetic acid is 1 / 2 / 0.1) and grind to obtain a uniform translucent suspension.

[0027] (2) Apply the above-mentioned suspension to the surface of the cleaned ceramic glazed tile by inkjet printing method to form a nanometer layer, and dry it under air condition.

[0028] (3) heat-treat the substrate in the above step (2) at 550°C for 1 hour under air conditions, and form a photocatalyst TiO on the surface of the substrate after cooling to room temperature 2 coating. The obtained coating has a smooth surface, uniform thickness, good transparency, and a thickness of 100 nanometers.

Embodiment 3

[0030] (1) Weigh 15 grams of TiO 2 Add 0.5L of nano powder to a solution containing water, ethanol, and glacial acetic acid (the volume ratio of water: ethanol: glacial acetic acid is 1 / 1 / 0.2) and grind to obtain a uniform translucent suspension without precipitation.

[0031] (2) Apply the above-mentioned suspension to the surface of the cleaned ceramic sanitary ware by spraying to form a nano-layer, and dry it under air conditions.

[0032] (3) heat-treat the substrate in the above step (2) at 600°C for 1 hour under air conditions, and form a TiO2 photocatalyst coating on the surface of the substrate after cooling to room temperature. The obtained coating has a smooth surface, uniform thickness, good transparency, and a thickness of 300 nanometers.

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Abstract

The invention discloses a preparation method of a titanium dioxide photocatalyst coating. The steps are: adding TiO2 nanometer powder or metatitanic acid into a mixed solution of water, ethanol and glacial acetic acid, and grinding to obtain a uniformly dispersed translucent suspension; The transparent suspension is coated on the surface of the substrate, and then dried to obtain a nano-layer; the substrate coated with the nano-layer is heat-treated at 400-600°C, and a titanium dioxide photocatalyst coating is formed on the surface of the substrate after cooling. The present invention directly uses TiO2 nanopowder or metatitanic acid as raw material without using any surfactant, and forms a uniform coating after heat treatment at 400-600 ° C. The coating is firmly combined with the substrate, has strong self-cleaning ability and good hydrophilicity , the effect of photodegrading organic pollutants is good, the service life is long, and compared with the existing method, the process is simple, the cost is low, and it is convenient for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide photocatalyst coating, in particular to a method for directly using TiO 2 Nano powder or metatitanic acid as raw material, TiO without adding any surfactant 2 The invention discloses a preparation method of a photocatalyst coating, which belongs to the technical field of nanometer coating self-cleaning. Background technique [0002] Industrial development has brought a lot of environmental pollution, which makes our living environment face many challenges. There are a lot of pollutants floating in the air, and these pollutants will be adsorbed on the surfaces of building curtain walls, cars, etc., seriously affecting people's quality of life. For example, the surface of the freshly washed car glass will be covered with dust after a day or two, which not only affects the driver's sight, but also brings many problems. Therefore, a coating with self-cleaning and anti-fog functions has em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B33/00C09D1/00
Inventor 杨萍车全德王俊鹏贾长超
Owner UNIV OF JINAN
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