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Porous titanium dioxide photocatalyst film and preparation method thereof

A technology of porous titanium dioxide and photocatalytic thin film, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor bonding firmness between membrane and substrate, complex preparation process, and difficulty in scaling up. , to achieve the effects of stable photocatalytic activity, simple preparation process, and easily controllable structure

Inactive Publication Date: 2012-07-25
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing titanium oxide thin film preparation technology still has disadvantages such as complicated preparation process, difficult scale-up, low crystallinity, and poor bonding firmness between the film and the substrate.

Method used

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  • Porous titanium dioxide photocatalyst film and preparation method thereof
  • Porous titanium dioxide photocatalyst film and preparation method thereof
  • Porous titanium dioxide photocatalyst film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sand the size to 42cm 2 The surface of the titanium sheet is polished smooth to remove the surface oxide layer; use 1:1 volume ratio of ethanol and isopropanol solution to ultrasonically wash, then ultrasonically wash with deionized water, and finally wash with N 2 Purge to dry.

[0020] The treated titanium sheet was soaked in 50mL of 15wt% H 2 o 2 In a mixed solution with 0.10mL ionic liquid 1-butyl-3-methylimidazole tetrafluoroborate (the concentration of hydrogen peroxide in the mixed solution is 15.0wt%, and the ionic liquid 1-butyl-3-methyl-imidazolium tetrafluoroborate The concentration of fluoroborate is 0.2wt%), placed in an oven and reacted at 80°C for 8h. The reacted titanium sheet was rinsed with deionized water three times, dried at 100°C, and then calcined at 450°C for 1 hour to obtain the target product.

[0021] figure 1 For the X-ray diffraction spectrum of the sample prepared in this embodiment, it can be determined from the spectrum that the film...

Embodiment 2

[0024] The ionic liquid consumption is changed into 0.05mL, and all the other contents are the same as described in Example 1 (the concentration of hydrogen peroxide in the mixed solution is 15.0wt%, the concentration of ionic liquid 1-butyl-3-methyl-imidazole tetrafluoroborate is 0.1wt%). The X-ray diffraction spectrum of the sample prepared by this embodiment can confirm that the film on the surface of the sample obtained is anatase TiO 2 , it can be seen from the SEM photo that it is a porous random sheet structure.

Embodiment 3

[0026] The ionic liquid consumption is changed into 0.15mL, and all the other contents are the same as described in Example 1 (the concentration of hydrogen peroxide in the mixed solution is 15.0wt%, the concentration of ionic liquid 1-butyl-3-methyl-imidazole tetrafluoroborate is 0.4wt%). The X-ray diffraction spectrum of the sample prepared by this embodiment can confirm that the film on the surface of the sample obtained is anatase TiO 2 , it can be seen from the SEM photo that it is a porous structure with flower-like microspheres, and the diameter of the microspheres is about 1 μm.

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Abstract

The invention discloses a porous titanium dioxide photocatalyst film and a preparation method thereof. A substrate participates in an oxidizing reaction, an ionic liquid is taken as a template agent, and the reaction speed is controlled, so that a pure anatase phase titanium oxide film can be directly obtained on the surface of a titanium sheet. The preparation method comprises the following steps of: preparing a mixed solution of a hydrogen peroxide solution and an ionic liquid, i.e., 1-butyl-3-methylimidazolium tetrafluoroborate; soaking a metal titanium sheet into a reaction liquid for reacting in a baking oven of 80 DEG C for couple hours; and taking the reacted titanium sheet out, and baking to obtain a titanium dioxide film. The preparation method has the advantages of readily-available raw materials, simple process, easiness for controlling conditions, short preparing period and easiness for amplifying on a large scale. The prepared pure anatase structure titanium dioxide film high the advantages of high crystallinity, high purity, firm combination with the substrate, high stability and repeatability.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalyst preparation, and in particular relates to a porous titanium dioxide photocatalytic film and a preparation method thereof. Background technique [0002] While the rapid development of world industry has provided people with rich material life, it has also brought many environmental problems. The discharge of the three wastes (waste water, waste residue, waste gas) in industrial production destroys the ecological balance, pollutes the environment, and seriously threatens people's healthy life. Among them, dye wastewater is one of the industrial wastewater that is difficult to degrade at present. The discharge of printing and dyeing wastewater accounts for about one tenth of the total discharge of industrial wastewater. ecological environment. [0003] Semiconductor photocatalysis technology can degrade a variety of toxic and harmful pollutants due to its strong oxidation abilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/10A62D3/176A62D3/17A62D101/20A62D101/28A62D101/26
Inventor 霍宇凝张佳李虎张亚陈晓芳李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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