首页|Ultra-rapid CO Gas Detection by a Gas Sensor Based on Flame-spray-made Pt/ZnO Nanoparticles

Ultra-rapid CO Gas Detection by a Gas Sensor Based on Flame-spray-made Pt/ZnO Nanoparticles

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  • NETL
  • NSTL
  • Trans Tech Publications Ltd
ZnO nanoparticles doped with 0.2-2 at.%Pt were successfully produced in a single step by flame spray pyrolysis (FSP) technique using zinc naphthenate and platinum (II) acetylacetonate dissolved in xylene. The particle properties were analyzed by XRD, BET and TEM. Depending on FSP conditions, ZnO nanoparticles and nanorods were observed. The crystallite sizes of ZnO spheroidal particles were found to be ranging from 5 to 20 nm, while ZnO nanorods were seen to be 5-20 nm in width and 20-40 nm in length. ZnO sensing films were prepared using Al_2O_3 substrate interdigitated with Au electrodes by spin-coating technique. The gas sensing properties toward carbon monoxide (CO) was studied at the operating temperatures ranging from 200 to 350℃. It was found that the 0.2 at.%Pt/ZnO sensing film showed the highest sensitivity and the fastest response time at 350℃.

flame spray pyrolysisZnOplatinumCOsensor

Nittaya Tamaekong、Chaikarn Liewhiran、Anurat Wisitsoraat、Sukon Phanichphant

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Nanoscience Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand

Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand

National Electronics and Computer Technology Center, Pathumthani, 12120, Thailand

2010

10.4028/www.scientific.net/KEM.421-422.332

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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