A solar full-band tio 2 /vs 4 Preparation method of photocatalyst

A photocatalyst, full-band technology, applied in the field of photocatalysis, to overcome difficulties in recycling, improve photocatalytic efficiency, and inhibit rapid recombination.

Active Publication Date: 2020-11-10
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the solar spectrum, near-infrared light accounts for about 44% of the total solar light intensity, but there has been no suitable photocatalyst to effectively utilize the near-infrared light band, so that it cannot maximize the use of light from ultraviolet light to near-infrared light. Photocatalysis in the full band of sunlight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] (1) Preparation of porous alumina template

[0020] First, the aluminum sheet was polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone, and distilled water respectively. Then, the aluminum sheet was used as the anode, graphite was used as the counter electrode, and 0.5 M oxalic acid solution was used as the electrolyte. 4 hours after the first anodization, take out the aluminum sheet, clean it, and immerse it in a mixed solution of 6% phosphoric acid and 1.5% chromic acid, and soak it for 12 hours at a temperature of 60°C; then use the same conditions as the first anodization Perform secondary oxidation to obtain a porous alumina template;

[0021] (2), TiO 2 Sol preparation

[0022] Mix a certain amount of butyl titanate and acetylacetone evenly, then slowly add 80 ml of absolute ethanol to the above mixture dropwise, and vigorously stir for 30 min while adding to obtain solution A; then add distilled water and absolute ethano...

specific Embodiment approach 1

[0029] (1) Preparation of porous alumina template

[0030] First, the aluminum sheet was polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone, and distilled water respectively. Then, the aluminum sheet was used as the anode, graphite was used as the counter electrode, and 0.5 M oxalic acid solution was used as the electrolyte. 4 hours after the first anodization, take out the aluminum sheet, clean it, and immerse it in a mixed solution of 6% phosphoric acid and 1.5% chromic acid, and soak it for 12 hours at a temperature of 60°C; then use the same conditions as the first anodization Perform secondary oxidation to obtain a porous alumina template;

[0031] (2), TiO 2 Sol preparation

[0032] Mix 20 ml of butyl titanate and 5 ml of acetylacetone evenly, then slowly add 80 ml of absolute ethanol dropwise into the above mixture, and stir vigorously for 30 min while adding to obtain solution A; then add 20 ml of distilled water and 20 Mix...

specific Embodiment approach 2

[0039] (1) Preparation of porous alumina template

[0040] First, the aluminum sheet was polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone, and distilled water respectively. Then, the aluminum sheet was used as the anode, graphite was used as the counter electrode, and 0.5 M oxalic acid solution was used as the electrolyte. 4 hours after the first anodization, take out the aluminum sheet, clean it, and immerse it in a mixed solution of 6% phosphoric acid and 1.5% chromic acid, and soak it for 12 hours at a temperature of 60°C; then use the same conditions as the first anodization Perform secondary oxidation to obtain a porous alumina template;

[0041] (2), TiO 2 Sol preparation

[0042] Mix 10 ml of butyl titanate and 10 ml of acetylacetone evenly, then slowly add 80 ml of absolute ethanol dropwise to the above mixture, and vigorously stir for 30 min while adding to obtain solution A; then add 10 ml of distilled water and 30 Mix ...

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Abstract

The invention relates to a preparation method of a solar full-band TiO2 / VS4 photocatalyst. The photocatalyst prepared by the method is firmly attached to an aluminium substrate, and can be easily recycled and reused, thus overcoming the recovery difficulty of a traditional powder photocatalyst. The photocatalyst is a nano-VS4 coated TiO2 nano-nanowire array structure, can inhibit rapid recombination of photo-induced electrons-holes, and improves the photocatalytic efficiency; at the same time, by combination of TiO2 with excellent ultraviolet photocatalytic effects and VS4 with excellent visible and near infrared photocatalytic effects, the nanoarray can maximize the use of full-band sunlight from ultraviolet to near infrared for photocatalysis, and the solar full-band TiO2 / VS4 photocatalyst has great significance to promote the application of natural solar photocatalytic technology, alleviate energy crisis and strengthen environmental governance.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a full-band TiO 2 / VS 4 Preparation method of photocatalyst. Background technique [0002] Energy shortage and environmental pollution are major challenges faced by human beings at present. The use of sunlight to decompose water to produce hydrogen and oxygen, reduce carbon dioxide and degrade organic pollutants is an important research hotspot in the field of photocatalysis. In the process of realizing solar photocatalysis, the construction of efficient photocatalyst system plays a decisive role. Since 1972 Nature published about TiO 2 After decomposing water into hydrogen and oxygen under the irradiation of ultraviolet light, people have studied TiO from various fields. 2 Photocatalysis has conducted in-depth research to explore the principle of the photocatalytic process and strive to improve the photocatalytic efficiency. Studies have shown that TiO 2 It can be used as an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/004
Inventor 张洪元徐靖才
Owner CHINA JILIANG UNIV
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