Preparation method of nano ZnO-SnO2 composite oxide photo-catalyst

A technology of composite oxides and photocatalysts, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. It can solve the problems of long washing process and achieve simple operation, fast response effect
CN1460544AInactive Publication Date: 2003-12-10GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2003-12-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The preparation method of nano ZnO-SnO2 composite oxide photocatalyst uses water soluble zinc salt and SnCl4.5H2O as raw material, uses ammonia water as precipitant, and utilizes the characteristics of that the amine salt formed by combining ammonia water with negative ion being in other solution can be decomposed into gas to escape when it is sintered and has no need of longer-time washing process so as to can obtain the invented catalyst with higher activity. Said catalyst can degrate and pollutant into harmless compound.
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Description

technical field

[0001] The invention relates to a nanometer ZnO-SnO 2 Preparation method of composite oxide photocatalyst. technical background

[0002] In the study of photocatalytic degradation, since the photocatalytic performance of semiconductor photocatalysts has a great relationship with the number and lifetime of photogenerated carriers (electron / hole pairs) of photocatalysts, the larger the number, the longer the lifetime, and the photocatalytic performance the better. However, the photogenerated carriers can be in 10 -9 Therefore, one of the key problems in improving photocatalytic activity is how to reduce the recombination probability of photogenerated electrons and holes.

[0003] The recombination of two semiconductors with different bandgap widths can enhance charge separation, suppress electron-hole recombination and extend the photoexcitation wavelength range, thus showing better stability and photocatalytic activity than single semiconductors.

[0004] ...

Claims

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