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Sensors 2011, 11(11), 10603-10614; doi:10.3390/s111110603

Design of Selective Gas Sensors Using Additive-Loaded In2O3 Hollow Spheres Prepared by Combinatorial Hydrothermal Reactions

1
Department of Materials Science and Engineering, Korea University, Seoul 136 713, Korea
2
Department of Chemical Engineering, Konkuk University, Seoul 143-701, Korea
*
Author to whom correspondence should be addressed.
Received: 16 September 2011 / Revised: 31 October 2011 / Accepted: 4 November 2011 / Published: 7 November 2011
(This article belongs to the Special Issue Sensing at the Nano-Scale: Chemical and Bio-Sensing)
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Abstract

A combinatorial hydrothermal reaction has been used to prepare pure and additive (Sb, Cu, Nb, Pd, and Ni)-loaded In2O3 hollow spheres for gas sensor applications. The operation of Pd- and Cu-loaded In2O3 sensors at 371 °C leads to selective H2S detection. Selective detection of CO and NH3 was achieved by the Ni-In2O3 sensor at sensing temperatures of 371 and 440 °C, respectively. The gas responses of six different sensors to NH3, H2S, H2, CO and CH4 produced unique gas sensing patterns that can be used for the artificial recognition of these gases. View Full-Text
Keywords: gas sensor; In2O3 hollow spheres; combinatorial method; selective detection; pattern recognition gas sensor; In2O3 hollow spheres; combinatorial method; selective detection; pattern recognition
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kim, S.-J.; Hwang, I.-S.; Kang, Y.C.; Lee, J.-H. Design of Selective Gas Sensors Using Additive-Loaded In2O3 Hollow Spheres Prepared by Combinatorial Hydrothermal Reactions. Sensors 2011, 11, 10603-10614.

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