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Effect of noble metals on selective detection of liquid petroleum gas by SnO2

Published online by Cambridge University Press:  31 January 2011

A. R. Phani  and
M. Pelino
A. R. Phani
Affiliation:
Department of Chemistry and Materials, University of L'Aquila, 67040 L'Aquila, Italy
M. Pelino
Affiliation:
Department of Chemistry and Materials, University of L'Aquila, 67040 L'Aquila, Italy
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Extract

The present investigation deals with the electrical response of doped SnO2 to improve the selectivity for liquid petroleum gas (LPG) in the presence of CO and CH4, by utilizing noble metal sensitizers such as Pd, Pt, and Rh. SnO2 with the addition of Pd (1.5 wt. %) or Pt (1.5 wt. %) sintered at 800 °C which have shown high sensitivity toward LPG with no cross interference of CO and CH4 at an operating temperature of 350 °C. The results suggest the possibility of utilizing the sensor for the detection of this hydrocarbon gaseous mixture. X-ray diffraction studies have been carried out to evaluate the crystallite size as a function of sintering temperature; x-ray photoelectron spectroscopy studies have been carried out to define the possible chemical species involved in the gas-solid interaction and the sensitivity enhancing mechanism of the SnO2/Pd sensor element toward LPG.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 7 , July 1998 , pp. 1780 - 1785
Copyright
Copyright © Materials Research Society 1998

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