کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5134607 | 1492953 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Nanostructured SnO2 uniform, good quality deposition by spray pyrolysis.
- Au sensitization was done by gold (Au) salt (0.001Â M solution) by SPD method.
- SnO2 film, Au-sensitized SnO2 film used for liquefied petroleum gas (LPG) sensing.
- Au-sensitized SnO2 showed improved fast (60Â s) LPG response 57% at 780Â ppm.
- Au electric and spillover effect mechanism for LPG sensing is studied.
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 â¼10Â nm. The highest gas response observed at 780Â ppm LPG concentration for pristine SnO2 is 28%, at operating temperature 623Â K, which is greatly improved on Au sensitization up to 57% with 60Â s rapid response time at 598Â 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 .
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Journal: Journal of Analytical and Applied Pyrolysis - Volume 124, March 2017, Pages 362-368