Table of Contents
Conference Papers in Science
Volume 2014, Article ID 812627, 4 pages
Conference Paper

Effect of MgO and V2O5 Catalyst on the Sensing Behaviour of Tin Oxide Thin Film for SO2 Gas

1Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
2Physics Department, Miranda House, University of Delhi, Delhi 110007, India

Received 8 February 2014; Accepted 10 March 2014; Published 2 April 2014

Academic Editors: P. Mandal, R. K. Shivpuri, and G. N. Tiwari

This Conference Paper is based on a presentation given by Punit Tyagi at “National Conference on Advances in Materials Science for Energy Applications” held from 9 January 2014 to 10 January 2014 in Dehradun, India.

Copyright © 2014 Punit Tyagi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present work shows the SO2 gas sensing property of SnO2 thin film based sensor prepared by using RF sputtering technique. Different catalysts (MgO and V2O5) in form of nanoclusters having diameter of 600 μm have been loaded on SnO2 surface to detect SO2 gas. The sensing response of all these films towards SO2 is monitored. Microstructural studies have been carried out using XRD and UV-Visible Spectrophotometer and a good correlation has been found between the microstructural and gas sensing properties of these deposited samples. Both catalysts when incorporated with SnO2 film show high selectivity towards SO2 gas at lower operating temperature. MgO gives a sensitivity of 317% at an operating temperature of 280°C towards 500 ppm of SO2 gas whereas V2O5 catalyst gives a sensitivity of 166% at 280°C for the same amount of gas.