Ray, I. and Chakraborty, S. and Chowdhury, A. and Majumdar, S. and Prakash, A. and Pyare, Ram and Sen, A. (2008) Room temperature synthesis of gamma-Fe2O3 by sonochemical route and its response towards butane. SENSORS AND ACTUATORS B-CHEMICAL, 130 (2). pp. 882-888. ISSN 0925-4005

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Nanocrystalline gamma iron oxide (gamma-Fe2O3) has been synthesized at room temperature through sonication-assisted precipitation technique. The key in obtaining gamma-Fe2O3 at room temperature lies in exploiting high-power ultrasound (600W). The gas-sensing properties to n-butane of pure gamma-Fe2O3 were investigated by studying the electrical properties of the sensor elements fabricated from the synthesized powder. The maximum response (similar to 90%) of the sensor to 1000 ppm n-butane at 300 degrees C can be explained on the basis of catalytic activity of the nanocrystallites. The response and recovery time of the sensor to 1000 ppm n-butane were less than 12 s and 120 s, respectively. (c) 2008 Published by Elsevier B.V.

Item Type: Article
Uncontrolled Keywords: gamma iron oxide; sonochemical; gas sensor; butane; room temperature
Subjects: Physical Properties
Depositing User: Bula Ghosh
Date Deposited: 20 Jan 2012 05:13
Last Modified: 20 Jan 2012 05:13
URI: http://cgcri.csircentral.net/id/eprint/401

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