A z-mechanism rich in oxygen vacancies bi 2 o 3 @ceo 2 Photocatalyst and its preparation method and application

A technology of photocatalyst and oxygen vacancies, applied in the field of photocatalysis, can solve the problems of low utilization rate, high photocatalyst photogenerated electron-hole recombination rate, etc., and achieve the effect of fast degradation rate, high catalytic degradation activity, and easy operation process
CN110124660BInactive Publication Date: 2022-02-01SHAANXI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI NORMAL UNIV
Publication Date
2022-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention proposes a Z-mechanism Bi that is rich in oxygen vacancies 2 o 3 @CeO 2 A photocatalyst and its preparation method and application belong to the field of photocatalysis technology, and the method includes 1) preparing a reaction liquid; 2) preparing a catalyst precursor body liquid; 3) N 2 Preparation of Intermediate Bi@CeO by High Temperature Calcination in a Protected Tube Furnace 2 ; 4) Preparation of Z-mechanism Bi rich in oxygen vacancies 2 o 3 @CeO 2 Photocatalyst; the catalyst is nanosheet-like Bi 2 o 3 CeO attached to the curd 2 The curd structure formed on the particle, the oxygen-vacancy-rich Z-mechanism Bi prepared by the method of the present invention 2 o 3 @CeO 2 Photocatalysts can be applied to degrade NOx in the air under visible light conditions, which not only have high degradation rate and long activity retention time, but also the intermediate product NO 2 The yield is small, and the products formed by degradation are low or non-toxic, and will not cause secondary pollution to the air.
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Description

technical field

[0001] The invention belongs to the technical field of photocatalysis, in particular to a Z-mechanism Bi that is rich in oxygen vacancies 2 o 3 @CeO 2 Photocatalyst and its preparation method and application. Background technique

[0002] Atmospheric Pollutants SOx, Nox and CO 2 Degradation of phospholipids has always been a matter of concern to people, because they not only bring huge challenges to the environment, but also seriously endanger human health and pose a huge challenge to future economic development. Photocatalytic oxidation technology is one of the efficient and green ways to degrade pollutants, usually with TiO 2 ,CeO 2 , ZnO, WO 3 Such semiconductors are used as photocatalysts, but these photocatalysts have poor electrical conductivity and weak oxidation ability due to their weak photoresponsive ability and low carrier separation and transfer efficiency.

[0003] CeO 2 As a traditional photocatalyst, because of its high efficiency, non...

Claims

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