Gold sensitized sprayed SnO2 nanostructured film for enhanced LPG sensing

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Date
2016-12-30
Authors
Nakate, Umesh T.
Patil, Pramila
Ghule, Balaji G.
Ekar, Satish U.
Al-Osta, Ahmed
Jadhav, Vijaykumar V.
Mane, Rajaram S.
Kale, S. N.
Naushad, Mu
O'Dwyer, Colm
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Elsevier
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Abstract
We report LPG sensing of gold (Au)-sensitized SnO2 nanostructured film fabricated by an easy spray pyrolysis deposition method whose surface morphology is confirmed by field-emission scanning electron microscopy and atomic force microscopy images and structure by X-ray diffraction pattern. Energy dispersive X-ray spectrometer analysis has carried out for finding elemental composition. The SnO2 film is uniform and consists of spherical particles of ∼10nm. The highest gas response observed at 780ppm LPG concentration for pristine SnO2 is 28%, at operating temperature 623K, which is greatly improved on Au sensitization up to 57% with 60s rapid response time at 598K operating temperature. The high gas response is due to electronic effect and catalytic spill-over effect of Au sensitization. The improved sensing mechanism has throughly been explored.
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Keywords
Gold sensitization , SnO , Nanostructure , LPG Spray pyrolysis
Citation
Nakate, U. T., Patil, P., Ghule, B. G., Ekar, S., Al-Osta, A., Jadhav, V. V., Mane, R. S., Kale, S. N., Naushad, M. and O'Dwyer, C. (2017) 'Gold sensitized sprayed SnO2 nanostructured film for enhanced LPG sensing', Journal of Analytical and Applied Pyrolysis, 124, pp. 362-368. doi: 10.1016/j.jaap.2016.12.029