Preparation and Gas-sensitivity of Several Spinel-type Nanocrystalline Mixed Oxides

Chinese Journal of Applied Chemistry ›› 1998, Vol. 0 ›› Issue (5): 14-17.

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Preparation and Gas-sensitivity of Several Spinel-type Nanocrystalline Mixed Oxides

Yang Xiaojuan, Liu Ersheng, Chen Naisheng, Huang Jinling

Research Institute of Functional Materials, Fuzhou University, Fuzhou 350002

Received:1997-11-19 Revised:1998-06-17 Published:1998-10-10 Online:1998-10-10

Abstract

Abstract: Four spinel-type mixed oxide nanocrystalline powders MFe₂O₄(M=Cu²⁺, Zn²⁺, Cd²⁺ and Mg²⁺) were prepared by chemical coprecipitation method. The products were characterized by means of powder XRD, TEM and specific surface area measurements. The results reveal that the samples are nanocrystalline powders with high specific surface areas. Their gas sensitivities to reductive gases depend on their specific surface area: the larger the specific surface area, the higher the sensitivity.

Key words: spinel-type mixed ferric oxide, nanocrystalline, preparation, gas sensitivity

Yang Xiaojuan, Liu Ersheng, Chen Naisheng, Huang Jinling. Preparation and Gas-sensitivity of Several Spinel-type Nanocrystalline Mixed Oxides[J]. Chinese Journal of Applied Chemistry, 1998, 0(5): 14-17.

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Preparation and Gas-sensitivity of Several Spinel-type Nanocrystalline Mixed Oxides

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