Method for preparing loaded nano titanium dioxide photocatalysis film

A technology of nano-titanium dioxide and photocatalytic thin film, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of unfavorable industrialization promotion and use, easy deactivation of photocatalysts, and difficulty in recycling, etc., to achieve High thermal stability and quantum efficiency, improved photocatalytic activity, and smooth surface

Inactive Publication Date: 2005-07-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to powdered TiO 2 Photocatalysts have shortcomings such as easy deactivation, easy aggregation, and difficulty in recycling during use, which is not conducive to industrial promotion and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: 337mL of a mixed solution of pure butyl titanate and absolute ethanol with a volume ratio of 1:3 was prepared, and after magnetic stirring, 16mL of analytically pure diethanolamine stabilizer was added to inhibit the strong hydrolysis of butyl titanate. After continuing to stir for 1 hour, slowly add a certain proportion of water, absolute ethanol and polyethylene glycol dropwise at room temperature at 25°C, the mass ratio of which is water, absolute alcohol and polyethylene glycol 600=3: 7:1; the weight is 45 grams, and the stirring is continued for 2 hours to obtain a stable and transparent light yellow sol, which is left to stand for 24 hours for later use. Titanium dioxide film was loaded on the surface of stainless steel wire mesh by dipping-pulling method, the pulling speed was 10cm / min, dried in the air and then dried at 80°C to form a film, repeated 3 times, and finally placed in a muffle furnace at 550°C After calcination at high temperature for 5 ho...

Embodiment 2

[0017] Example 2: The process steps of this example are basically the same as those of Example 1, except that the volume ratio of the raw material pure butyl titanate and absolute ethanol is 1:4, and the added water, absolute ethanol and polyethylene glycol The weight of the alcohol mixture is 50 grams, and finally calcined in a muffle furnace at a temperature of 500° C. for 5 hours to prepare a nano-titanium dioxide photocatalytic film supported on the surface of stainless steel.

[0018] According to X-ray diffraction analysis (XRD), the crystal form of titanium dioxide in the film is a mixed crystal structure, in which the anatase type particles account for about 75%, and the rutile type particles account for about 25%.

[0019] Through transmission electron microscope (TEM) observation, it was found that the average grain size of titanium dioxide was 20 nm. And the particle distribution is uniform.

[0020] Photocatalytic activity evaluation test: use formaldehyde liquid ...

Embodiment 3

[0021] Example 3: The process steps of this example are basically the same as those of Example 1, except that the volume ratio of the raw material pure butyl titanate to absolute ethanol is 1:5, and the added water, absolute ethanol and polyethylene glycol The weight of the alcohol mixture is 55 grams, and finally calcined at 450° C. for 5 hours in a muffle furnace to prepare a nano-titanium dioxide photocatalytic film loaded on the surface of stainless steel.

[0022] According to X-ray diffraction analysis (XRD), the crystal form of titanium dioxide in the film is a mixed crystal structure, in which the anatase type particles account for about 80%, and the rutile type particles account for about 20%.

[0023] Through transmission electron microscope (TEM) observation, it was found that the average grain size of titanium dioxide was 25 nm. And the particle distribution is uniform.

[0024] Photocatalytic activity evaluation test: use formaldehyde liquid for photocatalytic de...

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Abstract

This invention relates to a sol to gel method to process load nanometer titania effective light catalyzer thin film process method, which belongs to light catalyzer materials chemical technique field and comprises the following steps: using the pure titanic acid butonate and absolute ethyl alcohol, aminoethyl alcohol, water, poly-glycol 600 as materials; getting transparent stable light yellow titania sol through common temperature chemical reaction; then adopting the dipping and lifting method to load titania thin film on metal wire surface; finally burning in Muffle furnace under temperature of 450íµ to 550íµ to get the light catalyzer thin film.

Description

technical field [0001] The invention relates to a method for preparing a loaded nano titanium dioxide 2 high-efficiency photocatalytic film by using a sol-gel method, and belongs to the technical field of photocatalytic material chemistry and chemical engineering. Background technique [0002] In recent years, with the increasingly serious environmental problems worldwide, the use of TiO 2 The use of photocatalysts for environmental purification has attracted extensive attention. Currently, TiO 2 The application of photocatalyst mainly focuses on the purification and treatment of water and air, TiO 2 Photocatalytic oxidation can effectively remove toxic and harmful substances in air and water without secondary pollution. It is an environmentally friendly catalytic purification technology in the 21st century. Under the action of light, the strong oxidizing groups generated on the surface of semiconductor materials are used to oxidize and degrade most toxic and harmful orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/03
Inventor 施利毅孙召梅张剑平贾桂玲谢晓峰饶薇薇
Owner SHANGHAI UNIV
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