Properties and mechanism study of Ag doped SnO2 thin films as H2S sensors

被引：63

作者：

Liu, CH

Zhang, L

He, YJ

机构：

[1] Department of Physics, Tsinghua University

来源：

THIN SOLID FILMS | 1997年 / 304卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

tin oxide; gas sensors; hydrogen sulphide; semiconductors;

D O I：

10.1016/S0040-6090(97)00107-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ag doped tin oxide thin films were prepared by evaporating the mixture of SnO2, and Ag powder. The granular film with a high Ag incorporation (16 at.%) was found to possess excellent sensitivity, selectivity and rapid response to the presence of H2S gas at low temperature. X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis were carried out to investigate the sensing mechanism. The film was composed of tin oxide with oxygen deficiency (Sn3O4) and Ag2O crystals. Direct evidence of H2S adsorption on the Ag2O grain surface was observed. (C) 1997 Elsevier Science S.A.

引用

页码：13 / 15

页数：3

共 9 条

[1] SNO2 SENSORS - CURRENT STATUS AND FUTURE-PROSPECTS
GOPEL, W
SCHIERBAUM, KD
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 1995, 26 (1-3) : 1 - 12
[2] CHEMISORPTION AND CHARGE-TRANSFER AT IONIC SEMICONDUCTOR SURFACES - IMPLICATIONS IN DESIGNING GAS SENSORS
GOPEL, W
[J]. PROGRESS IN SURFACE SCIENCE, 1985, 20 (01) : 9 - 103
[3] SURFACE PROCESSES IN THE DETECTION OF REDUCING GASES WITH SNO2-BASED DEVICES
KOHL, D
[J]. SENSORS AND ACTUATORS, 1989, 18 (01): : 71 - 113
[4] Madou M. J., 1989, CHEM SENSING SOLID S
[5] HYDROGEN-SULFIDE SENSOR-BASED ON TIN OXIDE DEPOSITED BY SPRAY-PYROLYSIS AND MICROWAVE PLASMA CHEMICAL-VAPOR-DEPOSITION
MANORAMA, S
DEVI, GS
RAO, VJ
[J]. APPLIED PHYSICS LETTERS, 1994, 64 (23) : 3163 - 3165
[6] RECENT DEVELOPMENTS IN SEMICONDUCTING THIN-FILM GAS SENSORS
SBERVEGLIERI, G
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 1995, 23 (2-3) : 103 - 109
[7] Sberveglieri G, 1992, GAS SENSORS PRINCIPL
[8] AC MEASUREMENTS ON TIN OXIDE SENSORS TO IMPROVE SELECTIVITIES AND SENSITIVITIES
WEIMAR, U
GOPEL, W
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 1995, 26 (1-3) : 13 - 18
[9] YAMAZOE N, 1991, CHEM SENSOR TECHNOLO, V3

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