Preparation method of bismuth vanadate/titania composite photocatalytic material

A composite photocatalysis and titanium dioxide technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of difficult migration of photogenerated carriers, small specific surface area of ​​catalysts, and poor adsorption performance, etc. Achieve the effect of increasing absorption, easy promotion and use, and reducing band gap energy

Inactive Publication Date: 2018-04-10
BEIJING FORESTRY UNIVERSITY
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure BiVO 4 Catalysts have problems such as small specific surface area, poor adsorption performance, and difficult migration of photogenerated carriers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Dissolve bismuth nitrate in a certain concentration of nitric acid solution, and stir to obtain milky white solution A.

[0023] (2) Dissolve ammonium vanadate in a certain concentration of sodium hydroxide solution, stir evenly to obtain solution B, slowly add liquid B to liquid A, adjust the pH of the solution to 5-7, and obtain a yellow clear solution after stirring uniformly c.

[0024] (3) Put the solution C into a high-pressure reactor, react in a high-temperature and high-pressure environment for a period of time, filter the generated orange-yellow precipitate, wash with water, and dry to obtain bismuth vanadate.

[0025] (4) Dissolve 10 ml of butyl titanate in 25 ml of absolute ethanol, and then add 2 ml of glacial acetic acid to obtain solution D. Solution E was obtained by mixing 12.5ml of absolute ethanol and 2ml of distilled water evenly.

[0026] (5) Slowly add solution E to solution D, then add an appropriate amount of bismuth vanadate and mix well, ...

Embodiment 2

[0033] (1) Dissolve bismuth nitrate in a certain concentration of nitric acid solution, and stir to obtain milky white solution A.

[0034] (2) Dissolve ammonium vanadate in a certain concentration of sodium hydroxide solution, stir evenly to obtain solution B, slowly add liquid B to liquid A, adjust the pH of the solution to 5-7, and obtain a yellow clear solution after stirring uniformly c.

[0035] (3) Put the solution C into a high-pressure reactor, react in a high-temperature and high-pressure environment for a period of time, filter the generated orange-yellow precipitate, wash with water, and dry to obtain bismuth vanadate.

[0036] (4) Dissolve 10 ml of butyl titanate in 25 ml of absolute ethanol, and then add 2 ml of glacial acetic acid to obtain solution D. Solution E was obtained by mixing 12.5ml of absolute ethanol and 2ml of distilled water evenly.

[0037] (5) Slowly add solution E to solution D, then add an appropriate amount of bismuth vanadate and mix well, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a preparation method of a bismuth vanadate / titanium dioxide composite photocatalytic material. That is, by hydrothermal method and sol-gel method, titanium dioxide and another semiconductor bismuth vanadate are compounded, so that the light absorption range of the composite semiconductor is extended to visible light, increasing the absorption efficiency of titanium dioxide for sunlight, and improving its Quantum efficiency and catalysis. After titanium dioxide is doped with bismuth vanadate, it is beneficial to the separation of electrons and holes in the catalyst, and after doping, the spectral response range of titanium dioxide can be expanded, and the crystal lattice of titanium dioxide is distorted. The surface of the new catalyst increases a lot of adsorbed Hydroxyl can promote the generation of hydroxyl radicals, and can change the electronic structure of titanium dioxide, reduce the band gap energy of titanium dioxide, and improve its photocatalytic efficiency.

Description

technical field [0001] The invention relates to a preparation method of a bismuth vanadate / titanium dioxide composite photocatalytic material, which belongs to the technical field of semiconductor composite photocatalytic material preparation. Background technique [0002] Among many semiconductor photocatalysts, TiO 2 It is recognized as the most promising environment-friendly photocatalytic material. In the solar spectrum, ultraviolet light accounts for 5%, visible light accounts for 47%, and TiO 2 Photocatalysts have a wide band gap and can only absorb ultraviolet light energy, so the utilization rate of solar energy is low. BiVO 4 As a new type of visible light semiconductor photocatalyst, it is a narrow bandgap semiconductor with superior performance, which has a good absorption response to visible light and has certain acid and alkali resistance and chemical stability. However, pure BiVO 4 Catalysts have problems such as small specific surface area, poor adsorptio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/10B01J37/03B01J37/08
CPCB01J23/22B01J23/002B01J35/004B01J37/036B01J37/082B01J37/10B01J2523/00B01J2523/47B01J2523/54B01J2523/55
Inventor 张骥陈瑶高建民王明杰刘付
Owner BEIJING FORESTRY UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap