Nanometer gas-sensing material of ternary composite metal oxide and production thereof

A ternary composite, gas-sensing material technology, applied in the field of ternary composite metal oxide nano gas-sensing materials and their preparation, can solve the problems of complex operation steps, unsatisfactory sensitivity and selectivity, etc., and achieves controllable reaction conditions, The effect of mild experimental conditions and simple equipment
CN1746130AInactive Publication Date: 2006-03-15BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2006-03-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

A nanometer gas-sensing material from ternary composite metal oxide and its production are disclosed. The procedure is carried out by preparing Zno-SnO2 presoma by co-precipitation, adding the third component metal oxide to obtain ternary metal composite oxide material with chemical formula MO-ZnO-SnO2 by secondary precipitation, and regulating compound composition, concentration of metal salt solution, Zn / Sn mol ratio, precipitation value and aging time. The ternary metal composite oxide consists of Mo 2-3mol% which is transient metal oxide and basic metal oxide, its grain size distribution is 30-90nm and specific surface is 20-100m2 / g. It has good sensitivity and selectivity.
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Description

Technical field:

[0001] The invention relates to a ternary composite metal oxide nano gas sensitive material and a preparation method thereof. Background technique:

[0002] SnO 2 It is an N-type semiconductor metal oxide, which can be used as a gas-sensing material for detecting reducing and oxidizing gases. The currently available SnO 2 Based sensors generally have poor stability, sensitivity and selectivity are not ideal, especially in the sintering process of sensor production, the temperature is often ≥ 600 ° C, due to SnO 2 Particle growth or agglomeration greatly reduces sensitivity and selectivity. Researchers generally believe that the sensitive characteristics of gas-sensitive materials are closely related to their particle size and thermal stability. With the development of nanomaterials, sensors have entered a new stage. Due to their unique size effects and surface effects, nanostructured materials It is very sensitive to light, electricity, temperature and ga...

Claims

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