%0 Journal Article %A O. Alizadeh Sahraei and A. Khodadadi and Y. Mortazavi and M. Vesali Naseh and S. Mosadegh %D 2009 %J International Journal of Chemical and Molecular Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 25, 2009 %T Low Temperature Ethanol Gas Sensor based on SnO2/MWNTs Nanocomposite %U https://publications.waset.org/pdf/2478 %V 25 %X A composite made of plasma functionalized multiwall carbon nanotubes (MWNTs) coated with SnO2 was synthesized by sonochemical precipitation method. Thick layer of this nanocomposite material was used as ethanol sensor at low temperatures. The composite sensitivity for ethanol has increased by a factor of 2 at room temperature and by a factor of 13 at 250°C in comparison to that of pure SnO2. SEM image of nanocomposite material showed MWNTs were embedded in SnO2 matrix and also a higher surface area was observed in the presence of functionalized MWNTs. Greatly improved sensitivity of the composite material to ethanol can be attributed to new gas accessing passes through MWNTs and higher specific surface area. %P 41 - 44