Effects of cobalt doping on nitric oxide, acetone and ethanol sensing performances of FSP-made SnO2 nanoparticles
作者： M. Punginsang , A. Wisitsora-at , A. Tuantranont , S. Phanichphant , C. Liewhiran
DOI: 10.1016/J.SNB.2015.01.028
关键词:
摘要: Abstract In the present work, gas-sensing properties of flame-spray-made Co-doped SnO2 nanoparticles are systematically studied for detection nitric oxide (NO), acetone (C3H6O) and ethanol (C2H5OH) gases occurred in human breathe. Structural characterizations by electron microscopy X-ray analysis confirmed formation loosely agglomerated (5–20 nm) with highly crystalline tetragonal-cassiterite structure Co substitutional doping Co2+ Co3+ oxidation states. The unload sensors were tested towards NO, ethanol. Tested results indicated that small Co-doping levels range 0.2–0.5 wt% led to enhanced sensing toward compared undoped one. particular, 0.2 wt% sensor showed very high response ∼1637–1000 ppm NO at 350 °C while 0.5 wt% one exhibited responses ∼660–2000 ppm ∼806–1000 ppm Thus, potential responsive detections ppm-level but limited selectivity may be useful general environmental, industrial biomedical applications.
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