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Potentiometric VOC detection in air using 8YSZ-based oxygen sensor modified with SmFeO3 catalytic layer by Masami Mori; Hiroyuki Nishimura; Yoshiteru Itagaki; Yoshihiko Sadaoka is a Engineering article available to read on EtoBox.

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Potentiometric oxygen sensor was fabricated and applied to detect several volatile organic compounds (VOCs; acetic acid, methylethylketone (MEK), ethanol, benzene, toluene, o-and p-xylene) at sub-ppm levels in the temperatures range of 400-500 • C. The electromotive force (EMF) linearly changed with the logarithm of VOC concentration. Especially for ethanol and MEK, the sensitivity and EMF at 1 ppm were distinctly lowered for the sensor with the SmFeO 3 coated Pt working electrode. It seems that ethanol and MEK were more easily oxidized on the SmFeO 3 surface than the other VOCs. A discriminative detection of ethanol and MEK apart from the others could be achieved with the combination of two types of the sensors, Pt|8YSZ|Pt(ref. ) and SmFeO 3 /Pt|8YSZ|Pt(ref. ).

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Author

Masami Mori; Hiroyuki Nishimura; Yoshiteru Itagaki; Yoshihiko Sadaoka

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0925-4005)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)