Srivastava, Shubhda and Jain, Kiran and Singh, V. N. and Singh, Sukhvir and Vijayan, N. and Dilawar, Nita and Gupta, Govind and Senguttuvan, T. D. (2012) Faster response of NO2 sensing in graphene-WO3 nanocomposites. Nanotechnology, 23 (20). pp. 205501-205508. ISSN 0957-4484

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Abstract

Graphene-based nanocomposites have proven to be very promising materials for gas sensing applications. In this paper, we present a general approach for the preparation of graphene-WO3 nanocomposites. Graphene-WO3 nanocomposite thin-layer sensors were prepared by drop coating the dispersed solution onto the alumina substrate. These nanocomposites were used for the detection of NO2 for the first time. TEM micrographs revealed that WO3 nanoparticles were well distributed on graphene nanosheets. Three different compositions (0.2, 0.5 and 0.1 wt%) of graphene with WO3 were used for the gas sensing measurements. It was observed that the sensor response to NO2 increased nearly three times in the case of graphene-WO3 nanocomposite layer as compared to a pure WO3 layer at room temperature. The best response of the graphene-WO3 nanocomposite was obtained at 250 degrees C.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s IOP Publishing.
Subjects:	Materials Science Applied Physics/Condensed Matter Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Mar 2020 10:41
Last Modified:	12 Mar 2020 10:41
URI:	http://npl.csircentral.net/id/eprint/3567

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