Response speed of SnO2-based H2S gas sensors with CuO nanoparticles

Applied Physics Letters - Tập 84 Số 7 - Trang 1180-1182 - 2004
Arijit Chowdhuri1, Vinay Gupta1, K. Sreenivas1, Rajeev Kumar2, Subho Mozumdar2, P. K. Patanjali3
1Department of Physics and Astrophysics, University of Delhi-110007, India
2Department of Chemistry, University of Delhi-110007, India
3IPFT, Gurgaon, Haryana, India

Tóm tắt

CuO nanoparticles on sputtered SnO2 thin-film surface exhibit a fast response speed (14 s) and recovery time (61 s) for trace level (20 ppm) H2S gas detection. The sensitivity of the sensor (S∼2.06×103) is noted to be high at a low operating temperature of 130 °C. CuO nanoparticles on SnO2 allow effective removal of excess adsorbed oxygen from the uncovered SnO2 surface due to spillover of hydrogen dissociated from the H2S–CuO interaction.

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Applied Physics Letters

Tập 84 Số 7

1180-1182

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