GAS SENSITIVITY OF SNO2/CUO HETEROCONTACTS

被引：36

作者：

DEVI, GS

MANORAMA, S

RAO, VJ

机构：

[1] Materials Science Group, Physical and Inorganic Chemistry Division, Indian Institute of Chemical Technology

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1995年 / 142卷 / 08期

关键词：

D O I：

10.1149/1.2050087

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Gas sensors have been fabricated by a mixture of SnO2, CuO powder, and tetraethylorthosilicate. Their response to H2S gas has been investigated. A five ppm H2S gas concentration changes their resistivity to a value lower than that in air, even in the presence of other gases. By protecting the sensor surface with organic material, sensitivity and selectivity for H2S gas has been achieved. The observed change in conductivity of these films upon exposure to H2S gas in air has been explained on the basis of band theory of solids supported by our x-ray diffraction data and I-V characteristics.

引用

页码：2754 / 2757

页数：4

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