Gold sensitized sprayed SnO2 nanostructured film for enhanced LPG sensing

Umesh T. Nakate*, Pramila Patil, Balaji G. Ghule, Satish Ekar, Ahmed Al-Osta, V. V. Jadhav, Rajaram S. Mane, S. N. Kale, Mu Naushad, Colm O'Dwyer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


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 ∼10 nm. The highest gas response observed at 780 ppm LPG concentration for pristine SnO2 is 28%, at operating temperature 623 K, which is greatly improved on Au sensitization up to 57% with 60 s rapid response time at 598 K operating temperarture. 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.

Original languageEnglish
Pages (from-to)362-368
Number of pages7
JournalJournal of Analytical and Applied Pyrolysis
StatePublished - 1 Mar 2017
Externally publishedYes


  • Gold sensitization
  • LPG
  • Nanostructure
  • SnO
  • Spray pyrolysis


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