BiO2-x/Bi2O2.75/Zn2SnO4 composite photocatalyst, preparation method and application thereof

A technology of catalyst and compound light, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. It can solve the problem of low utilization rate of sunlight and difficulty in using far-infrared light, etc. problems, to achieve the effect of improving separation efficiency, simple process and simple operation
CN108993474AActive Publication Date: 2018-12-14SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2018-12-14

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Abstract

The invention discloses a BiO2-x / Bi2O2.75 / Zn2SnO4 composite photocatalyst, a preparation method and the application thereof. The preparation method comprises the steps of adding NaBiO3 to a NaOH solution and stirring uniformly to obtain a solution A; dispersing the solution A into water, adding Zn2SnO4 and mixing uniformly to obtain a reaction precursor solution; and hydrothermally reacting the reaction precursor solution to obtain the BiO2-x / Bi2O2.75 / Zn2SnO4 composite photocatalyst. The BiO2-x / Bi2O2.75 / Zn2SnO4 composite photocatalyst has oxygen vacancies, and the oxygen vacancies can broadenthe photoresponse of the catalyst to the near infrared range and the far infrared range; the Zn2SnO4 is closely attached to the surface of the bismuth oxide, and can form a cross energy band structurewith the bismuth oxide compound, thereby improving the separation efficiency of current carriers, and improving the reactivity of the photocatalyst.
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Description

technical field

[0001] The invention belongs to the field of functional materials, in particular to a BiO 2-x / Bi 2 o 2.75 / Zn 2 SnO 4 Composite photocatalyst and its preparation method and application. Background technique

[0002] At present, environmental pollution is becoming more and more serious, especially air pollution and water pollution, which have affected the normal life of human beings. So far, the most commonly used methods for treating polluted water bodies are the following, such as flotation, evaporation, extraction, redox, flocculation, etc. Although suspended solids and some organic pollutants can be removed, they are difficult to degrade Organic matter, the effect is very poor, and often cause secondary pollution. Compared with the above methods, semiconductor photocatalysis technology can completely degrade organic matter into non-toxic inorganic small molecules, the effect is good, and the cost is low with sunlight as the driving force, which has ...

Claims

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