Room-temperature H2S gas sensing at ppb level by single crystal In2O3 whiskers

被引：265

作者：

Kaur, Manmeet ^{[1
]}

Jain, Namrata ^{[3
]}

Sharma, Kamalkant ^{[3
]}

Bhattacharya, Shovit ^{[1
]}

Roy, Mainak ^{[2
]}

Tyagi, A. K. ^{[2
]}

Gupta, S. K. ^{[1
]}

Yakhmi, J. V. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Tech Phys & Prototype Engn Div, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[3] Amity Inst Nanotechnol, Noida 201301, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 133卷 / 02期

关键词：

indium oxide; gas sensor; chemiresistor; hydrogen sulphide;

D O I：

10.1016/j.snb.2008.03.003

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In2O3 whiskers and bipyramidal nano-crystals were prepared by a carbothermal method. These were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), photoluminescence and Raman spectroscopy. These were studied for application to sensing of H2S gas. The single crystal whiskers were found to be sensitive to as low as 200 ppb of H2S gas at room temperature and showed saturation in response at 10 ppm. On the other hand, the films made of bipyramids were less sensitive to H2S gas and the response was found to be a nearly linear function of concentration in a concentration range of 10-80 ppm. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：456 / 461

页数：6

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