Kundu, Susmita and Subramanian, Iyappan and Narjinary, Mousumi and Manna, Raju (2016) Enhanced performance of gamma-Fe2O3:WO3 nanocomposite towards selective acetone vapor detection. Ceramics International, 42 (6). pp. 7309-7314. ISSN 0272-8842

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Metal oxide nanocomposite sensors based on gamma-Fe2O3 and WO3 were investigated in acetone vapor of various concentrations (1-100 ppm) at operating temperatures between 250 and 350 degrees C. The composites were prepared by simple solid state mixing and porous thick-film gas sensors were fabricated on alumina substrates. The gamma-Fe2O3:WO3 (50:50) nanocomposite showed a marked enhancement in sensing response down to 1 ppm acetone vapor detection at 300 degrees C. The response was similar to 2-fold better compared to pure WO3 or pure gamma-Fe2O3 with a very fast response (1 s) and very short recovery time (3 s). No appreciable sensitivity was observed towards alcohol vapor (an interfacing agent for diabetics) and in moisture (present in breath). The enhanced performance was due to n-n heterojunction effect. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 08 Nov 2016 11:01
Last Modified: 08 Nov 2016 11:01
URI: http://cgcri.csircentral.net/id/eprint/3689

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