Comparative studies of doped and surface modified tin oxide towards hydrogen sensing: Synergistic effects of Pd and Ru

被引：38

作者：

Chaudhary, VA ^{[1
]}

Mulla, IS ^{[1
]}

Vijayamohanan, K ^{[1
]}

机构：

[1] Natl Chem Lab, Div Phys & Mat Chem, Pune 411008, Maharashtra, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 50卷 / 01期

关键词：

surface modification; tin oxide hydrogen sensor; synergism;

D O I：

10.1016/S0925-4005(98)00155-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A surface functionalised gas sensing material capable of giving better sensitivity and selectivity to hydrogen is demonstrated by grafting few Ru-O and Pd-O linkages in the surface of tin oxide. A systematic evaluation of the surface coverage, morphology and thermal stability using different techniques like EDAX, Cyclic voltammetry, SEM and TGA indicates the importance of an optimum distribution of Ru/Pd ratio (1.28) in dictating both sensitivity and selectivity. A comparison of the optimum performance of conventionally doped (225) and surface modified (1350) tin oxide to 1000 ppm hydrogen at 250 degrees C illustrates the clear advantages offered by surface modified tin oxide in enhancing the sensitivity. Moreover, the synergistic effect by surface functionalisation with both Ru and Pd species is emphasised in comparison to individually modified tin oxide sensors. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：45 / 51

页数：7

共 16 条

[11]

Orlik DR, 1995, J ANAL CHEM+, V50, P1073

[12] GAS-SENSING CHARACTERISTICS OF ZNO AND COPPER-IMPREGNATED ZNO [J].

RAJU, AR ;

RAO, CNR .

SENSORS AND ACTUATORS B-CHEMICAL, 1991, 3 (04) :305-310

[13] V2O5-BASED HYDROCARBON SENSORS [J].

RAJU, AR ;

RAO, CNR .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1991, (18) :1260-1261

[14] The effect of Pt and Pd surface doping on the response of nanocrystalline tin dioxide gas sensors to CO [J].

SchweizerBerberich, M ;

Zheng, JG ;

Weimar, U ;

Gopel, W ;

Barsan, N ;

Pentia, E ;

Tomescu, A .

SENSORS AND ACTUATORS B-CHEMICAL, 1996, 31 (1-2) :71-75

[15] STUDY ON A PALLADIUM-TITANIUM OXIDE SCHOTTKY DIODE AS A DETECTOR FOR GASEOUS COMPONENTS [J].

YAMAMOTO, N ;

TONOMURA, S ;

MATSUOKA, T ;

TSUBOMURA, H .

SURFACE SCIENCE, 1980, 92 (2-3) :400-406

[16] NEW APPROACHES FOR IMPROVING SEMICONDUCTOR GAS SENSORS [J].

YAMAZOE, N .

SENSORS AND ACTUATORS B-CHEMICAL, 1991, 5 (1-4) :7-19

← 1 2 →