Cobaltosic oxide-zinc oxide/grapheme ternary complex and preparation method thereof

A technology of tricobalt tetroxide and ternary composites, which is applied in the direction of cobalt oxide/cobalt hydroxide, zinc oxide/zinc hydroxide, and electrochemical variables of materials, which can solve the problem of reducing material performance, poor selectivity of specific gas response, and easy occurrence of nanoparticles Agglomeration and other problems, to achieve the effect of preventing agglomeration, excellent gas-sensing performance, and good application prospects
CN104237339AActive Publication Date: 2014-12-24NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2014-12-24

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Abstract

The invention discloses a cobaltosic oxide- zinc oxide / grapheme ternary complex and a preparation method thereof. The cobaltosic oxide-zinc oxide / grapheme ternary complex is prepared by the following steps: Co(No3)2 6H2O and a graphene oxide water solution are mixed, then an ammonia-water solution and a surface active agent PVP are added, and during a constant temperature backflow heat treatment process, Co(OH)2 loaded on graphene is produced; then, Zn(NO3)2 6H2O is added, then ammonia water is added again, and Zn(NH3)42+ and Zn(OH)2 are generated; finally, during a constant temperature heat treatment process of a reacting kettle, Co(OH)2 and Zn(OH)2 are taken as particles and grow through ostwald ripening, so as to form nanometer cobaltosic oxide and nano-zinc oxide particles loaded on the graphene, and the cobaltosic oxide-zinc oxide / grapheme ternary complex is prepared. The cobaltosic oxide-zinc oxide / grapheme ternary complex prepared according to the preparation method provided by the invention, an excellent gas-sensitive property is shown and the cobaltosic oxide- zinc oxide / grapheme ternary complex has a relatively good application prospect in the field of gas sensors.
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Description

technical field

[0001] The invention relates to a nano preparation method, in particular to a three-cobalt tetroxide-zinc oxide / graphene ternary compound and a preparation method thereof. Background technique

[0002] The n-type semiconductor zinc oxide is an important semiconductor material, which has attracted great attention in recent years due to its unique electrical and optical properties. It is well known that the gas-sensing performance is related to the morphology of the material, especially the surface area of ​​the material. Nano-zinc oxide materials have the characteristics of large specific surface area and easy preparation of composite materials. As gas-sensitive materials, they have good application prospects in detecting toxic, harmful and flammable gases, but there are still many needs in terms of selectivity, sensitivity and working temperature. The improvement; the p-type semiconductor cobalt tetroxide has high catalytic activity and gas-sensing performan...

Claims

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