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Preparation method for titanium dioxide thin layer loaded on surface of inorganic ceramic matrix

A technology of inorganic ceramics and titanium dioxide, applied in the field of preparation of titanium dioxide thin layer, can solve the problems of inactivation of titanium dioxide thin layer photocatalytic activity, poor photocatalytic activity, low crystallinity of titanium dioxide thin layer, etc., to achieve lasting photocatalytic activity, photo Good catalytic activity and easy operation

Active Publication Date: 2011-09-14
WUHAN DAFANG MECHANICAL & ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have certain limitations and disadvantages
For example: the size of the matrix material is limited to a small area; the crystallinity of the produced titanium dioxide thin layer is very low, resulting in poor photocatalytic activity; the more fatal problem is the relationship between the compound or element that makes up the matrix during the preparation process and the produced titanium dioxide. interaction to deactivate the photocatalytic activity of TiO thin layers

Method used

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  • Preparation method for titanium dioxide thin layer loaded on surface of inorganic ceramic matrix
  • Preparation method for titanium dioxide thin layer loaded on surface of inorganic ceramic matrix
  • Preparation method for titanium dioxide thin layer loaded on surface of inorganic ceramic matrix

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of the titanium dioxide thin layer supported on the surface of the inorganic ceramic substrate includes the following steps:

[0047] 1) Pre-coating a layer of zirconium dioxide pre-coating on the surface of the inorganic ceramic substrate:

[0048] (1) Prepare a sol solution of zirconium dioxide;

[0049] Zirconium dioxide sol solution configuration: According to the molar ratio of organic zirconium to complexing agent of 1.8:1, organic zirconium and complexing agent are selected, the organic zirconium is isopropyl zirconate, and the complexing agent is Acetylacetone; according to the molar ratio of organic zirconium to solvent of 0.07:1, select the solvent, the solvent is isopropanol; according to the molar ratio of organic zirconium to catalyst of 1000:1, select the catalyst, the catalyst is nitric acid ; According to the molar ratio of organic zirconium to water is 0.5:1, select water; add organic zirconium and complexing agent to the solvent, stir ...

Embodiment 2

[0069] The preparation method of the titanium dioxide thin layer supported on the surface of the inorganic ceramic substrate includes the following steps:

[0070] 1) Pre-coating a layer of zirconium dioxide pre-coating on the surface of the inorganic ceramic substrate:

[0071] (1) Prepare a sol solution of zirconium dioxide;

[0072] Zirconium dioxide sol solution configuration: According to the molar ratio of organic zirconium to complexing agent is 1.0:1, select organic zirconium and complexing agent; according to the molar ratio of organic zirconium to solvent is 0.05:1, select solvent; press organic zirconium The molar ratio to the catalyst is 5×10 2 :1, select the catalyst; according to the molar ratio of organic zirconium to water of 0.1:1, select water; add the organic zirconium and the complexing agent to the solvent, stir evenly at room temperature to obtain a solution; then combine the catalyst and water Add to the above solution and continue to stir for 10 hours to obta...

Embodiment 3

[0085] The preparation method of the titanium dioxide thin layer supported on the surface of the inorganic ceramic substrate includes the following steps:

[0086] 1) Pre-coating a layer of zirconium dioxide pre-coating on the surface of the inorganic ceramic substrate:

[0087] (1) Prepare a sol solution of zirconium dioxide;

[0088] Zirconium dioxide sol solution configuration: According to the molar ratio of organic zirconium to complexing agent is 1.5:1, select organic zirconium and complexing agent; according to the molar ratio of organic zirconium to solvent is 0.06:1, select solvent; press organic zirconium The molar ratio to the catalyst is 8×10 2 :1, select the catalyst; according to the molar ratio of organic zirconium to water of 0.3:1, select water; add the organic zirconium and the complexing agent to the solvent, stir evenly at room temperature to obtain a solution; then combine the catalyst and water Add to the above solution and continue to stir for 12 hours to obta...

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Abstract

The invention relates to a preparation method for a titanium dioxide thin layer loaded on the surface of an inorganic ceramic matrix. The preparation method is characterized by comprising the following steps of: 1) precoating a layer of zirconium dioxide precoating on the surface of the inorganic ceramic matrix, wherein the step 1) comprises the sub-steps of: (1) preparing a sol solution of zirconium dioxide, (2) coating the sol solution of the zirconium dioxide on the cleaned surface of the inorganic ceramic matrix, and (3) performing thermal treatment on the inorganic ceramic matrix of which the surface is coated with a gel layer; and 2) preparing the titanium dioxide thin layer on the surface of the inorganic ceramic matrix loaded with the zirconium dioxide precoating, wherein the step2) comprises the sub-steps of: (1) preparing sol solution of titanium dioxide, (2) coating the sol solution of the titanium dioxide on the surface of the inorganic ceramic matrix loaded with the zirconium dioxide precoating, and (3) performing thermal treatment on the inorganic ceramic matrix loaded with a gel film. The preparation method is easy to implement. The titanium dioxide thin layer prepared by the method can be firmly loaded on the surface of the inorganic ceramic matrix, and has high and durable photocatalytic activity.

Description

Technical field [0001] The invention relates to a preparation method of a titanium dioxide thin layer supported on the surface of an inorganic ceramic substrate (or inorganic ceramic material). Background technique [0002] The heterogeneous photocatalytic process using semiconductor oxide as the photocatalyst is a unique performance that directly uses ultraviolet light source to activate the catalyst at room temperature and atmospheric pressure, drives the oxidation-reduction reaction process, and completely degrades organic compounds in the air or water. An ideal environmental pollution control technology. However, there are still several scientific and technical problems in the practical application of photocatalytic technology mainly based on semiconductor titanium dioxide. One of the key problems is how to firmly support the titanium dioxide photocatalyst powder on the substrate, such as ceramic, glass and metal surface, so that it can be recycled and maintain long-lasting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 胡松平
Owner WUHAN DAFANG MECHANICAL & ELECTRICAL