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Method of preparation crystalized TiO2 porous film at room temperature

A porous film, crystallization technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited application range of porous films, difficult to apply, poor heat resistance, etc. The effect of contacting, enhancing adsorption, and increasing specific surface area

Inactive Publication Date: 2007-07-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

The process in TiO 2 The preparation of porous thin films has been quite mature and widely used, but it limits the TiO 2 The selection of porous film for supporting substrates, some substrates with poor heat resistance, or substrates that are not easily heat-treated are difficult to be applied in this process, so that TiO 2 The range of applications of porous films is limited

Method used

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  • Method of preparation crystalized TiO2 porous film at room temperature

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Embodiment Construction

[0024] The present invention is based on containing TiO 2 Grained TiO 2 The sol is mixed with the template agent to form a coating solution, and the coating solution is used to coat the TiO 2 film. Then, it is immersed in the template remover, the template agent is removed by dissolving, and after washing and drying, crystalline TiO 2 porous film.

[0025] in:

[0026] Selection of template agent: The addition of template agent will not affect the stability of the coating liquid system, and no delamination and precipitation will occur; meanwhile, the template agent has strong solubility in the template remover.

[0027] Selection of template remover: template remover is a good solvent for template agent, and it is also a good solvent for TiO 2 The poor solvent of the film, that is, the use of the template remover only selectively dissolves and removes the template component in the film, and does not affect the TiO 2 cause damage.

[0028] The template agent can be spher...

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Abstract

A process for preparing the porous film of crystalline TiO2 at ordinary temp in order to obtain the increased specific surface area and photocatalytic efficiency includes such steps as mixing the TiO2 sol containing TiO2 crystal grains with template agent, stirring, laying aside to become filming liquid, coating it on substrate, drying in the air, immersing in template removing agent, ultrasonic oscillation, immersing in absolute alcohol, ultrasonic oscillation, flushing with deionized water and drying.

Description

technical field [0001] The present invention relates to a kind of preparation method of film product, more specifically, the present invention relates to a kind of room temperature preparation crystalline TiO 2 porous film method. Background technique [0002] In recent years, TiO 2 Due to its excellent physical and chemical properties, it has attracted extensive research interest in the field of photocatalysis. with TiO 2 Powder catalyst compared to TiO 2 Thin-film catalysts are easier to recycle, and are easy to load on different substrates such as glass, ceramics, and metals, so they have a wide range of applications in antibacterial and decomposition of toxic substances. To improve TiO 2 A lot of work has been done on the photocatalytic activity and photocatalytic efficiency of thin films, due to the porous TiO 2 The film has a high specific surface area, which can effectively absorb the decomposed substances and increase the TiO 2 Contact with the decomposed matt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/10B01J35/02B01J35/00
Inventor 杨辉申乾宏高基伟
Owner ZHEJIANG UNIV
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