Ingole, S. M. and Navale, S. T. and Navale, Y. H. and Bandgar, D. K. and Stadler, F. J. and Mane, R. S. and Ramgir, N. S. and Gupta, S. K. and Aswal, D. K. and Patil, V. B. (2017) Nanostructured tin oxide films: Physical synthesis, characterization, and gas sensing properties. Journal of Colloid and Interface Science , 493. pp. 162-170. ISSN 0021-9797

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Abstract

Nanostructured tin oxide (SnO2) films are synthesized using physical method i.e. thermal evaporation and are further characterized with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy measurement techniques for confirming its structure and morphology. The chemiresistive properties of SnO2 films are studied towards different oxidizing and reducing gases where these films have demonstrated considerable selectivity towards oxidizing nitrogen dioxide (NO2) gas with a maximum response of 403% to 100 ppm @200 degrees C, and fast response and recovery times of 4 s and 210 s, respectively, than other test gases. In addition, SnO2 films are enabling to detect as low as 1 ppm NO2 gas concentration @200 degrees C with 23% response enhancement. Chemiresistive performances of SnO2 films are carried out in the range of 1-100 ppm and reported. Finally, plausible adsorption and desorption reaction mechanism of NO2 gas molecules with SnO2 film surface has been thoroughly discussed by means of an impedance spectroscopy analysis.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry Chemistry > Analytical Chemistry Chemistry > Physical Chemistry Electrochemistry Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Nov 2018 07:59
Last Modified:	12 Nov 2018 07:59
URI:	http://npl.csircentral.net/id/eprint/2804

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