Research Article
Open Access
SO2 sensing performance of chemically sprayed WO3- V2O5 nanocompositesthin films
J. M. Patil1*, S. B. Patil2, R. H. Bari2 and A. N. Sonar1
1*Department of Chemistry, Shri. V. S. Naik, A.C.S. College, Raver, 425508, Maharashtra, India.
2Nanomaterials Research Laboratory, Department of Physics, G. D. M. Arts, K. R. N. Com. And M. D. Science College, Jamner, 424 206, Maharashtra, India.
J. M. Patil et al /Int.J. Chemical Concepts. 2016,2(1),pp 12-23.
Abstract
WO3, V2O5, and WO3-V2O5 nanocomposites thin films were prepared by spray pyrolysis
method onto the heated glass substrate at 350 oC. The films were fired at 500 oC. As prepared thin
films were studied using XRD, FE-SEM and EDAX to know crystal structure, surface morphology and
elemental composition. The gas sensing performance of pure WO3, V2O5, and different composition of
WO3-V2O5 was studied on exposure of different conventional gases for 500 ppm. The film sprayed for
composition of WO3-V2O5 (Sample =S4) was observed to be most sensitive (S = 1130) to SO2 at
350 oC. The sensor shows quick response (4 s) and fast recovery (8 s) time. The results are discussed
and interpreted.
Keywords
Spray Pyrolysis, WO3-V2O5 nanocomposites, SO2 gas sensing, quick response, fast recovery
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