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Preparation of Mesoporous and meso-macroporous SnO2 powders and application to H2 gas sensors

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Title: Preparation of Mesoporous and meso-macroporous SnO2 powders and application to H2 gas sensors
Authors: Yuan, Luyang / Hyodo, Takeo / Shimizu, Yasuhiro / Egashira, Makoto
Issue Date: 2009
Publisher: MYU
Citation: Sensors and Materials, 21(5), pp.241-250; 2009
Abstract: Mesoporous SnO2 (mp-SnO2) and meso-macroporous SnO2 (m-mp-SnO2) pellet-type gas sensors were fabricated by the sol-gel method employing SnCl4-5H2O as a Sn source. The mesoporous structure was controlled by C20H37O 7SNa, while the macroporous structure was controlled by polymethylmethacrylate (PMMA) microspheres. The introduction of macropores by the addition of PMMA microspheres into mp-SnO2 tends to increase the pore diameter and crystallite size. The large amount of macropores introduced into mp-SnO2 sensors by the addition of PMMA microspheres in the preparation process significantly increased the resistance of all the sensors. Among all those tested, the mp-SnO2 sensor with only 5 wt% Sb 2O5 added exhibited the largest response at 400°C. The 70% response and recovery times could be reduced by the introduction of macropores.
Keywords: Gas sensor / Macropore / Mesopore / Tin dioxide
URI: http://hdl.handle.net/10069/22657
ISSN: 09144935
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/22657

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