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Gas sensing properties of a stabilized zirconia-based sensor with a porous MoO3 electrode prepared from a molybdenum polyoxometallate–alkylamine hybrid film by Tetsuya Kida; Kohsuke Kawasaki; Kaoru Iemura; Kazushi Teshima; Masamitsu Nagano is a Engineering article available to read on EtoBox.

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Mo 7 O 24 6--hexylamine hybrid films have been deposited on an yttrium stabilized zirconia (YSZ) tube from an aqueous solution containing Mo 7 O 24 6-and hexylamine by using the simple dip-coating method. An XRD analysis of the inorganic-organic hybrid film confirms a well-ordered regular multilayer structure. Calcination of the hybrid film at 500 • C results in the formation of a porous electrode consisting of nanosized MoO 3 particles, as revealed by AFM and SEM. A zirconia-based device fitted with the porous MoO 3 electrode shows higher sensitivity towards H 2 (50-500 ppm) and NH 3 (10-100 ppm) in air at 500 • C, as compared with a zirconia-based device fitted with an electrode prepared from reagent MoO 3 powders. This study demonstrates that a molybdenum polyoxometallate-alkylamine hybrid film is a useful precursor for preparing porous MoO 3 electrodes with high gas sensitivity.

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Author

Tetsuya Kida; Kohsuke Kawasaki; Kaoru Iemura; Kazushi Teshima; Masamitsu Nagano

Publisher

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

Published

2006

Language

EN

Field

Engineering (Physical Sciences)