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Enhanced ethanol-gas sensing performance of Ce-doped SnO<inf>2</inf> hollow nanofibers prepared by electrospinning
Date Issued
09-09-2013
Author(s)
Mohanapriya, Panneerselvam
Segawa, Hiroyo
Watanabe, Ken
Watanabe, Kenji
Samitsu, Sadaki
Natarajan, T. S.
Jaya, N. Victor
Ohashi, Naoki
Abstract
Tin oxide (SnO2) hollow nanofibers doped with cerium oxide (CeOx) were synthesized to study the impact of CeO2 additives on their chemical sensing response. X-ray diffraction analysis and Raman scattering spectroscopic analysis showed that crystallization of CeO 2 in the fiber composites was observed only when the Ce concentration was greater than 6 mol%. Also, maximum sensing response to ethanol was seen in the fiber composites with 6 mol% addition of Ce. Accordingly, we have discussed the possible explanations for this, including the role of crystalline CeO 2 as a surface catalyst, and the role of hydrogen liberated during the dehydrogenation reaction of ethanol diffusing into the SnO2 lattice. The results obtained in this study indicate that SnO 2-CeO2 nanofiber composites are potential candidates for use as high-sensitivity gas sensors. © 2013 Elsevier B.V. All rights reserved.
Volume
188