Design of selective gas sensors using additive-loaded In2O3 hollow spheres prepared by combinatorial hydrothermal
Sun-Jung Kim1, In-Sung Hwang, Yun Chan Kang
1Department of Materials Science and Engineering, Korea University, Seoul 136-713, Korea. raosun@korea.ac.kr
Sensors (Basel, Switzerland)
|February 21, 2012
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.
