Gas sensitivity of Zn doped α-Fe2O3(SO42-, Sn, Zn) to carbon monoxide

F. J. He, T. Yao, B. D. Qu, J. S. Han, A. B. Yu

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It is shown that the doping of Zn and Sn can improve the gas sensitivity of α-Fe2O3-based sensing material to CO. X-ray photo-electron spectroscopy analysis suggests that this is mainly due to the fact that the simultaneous doping of Zn and Sn can increase the S and hence SO2-4 contents in the α-Fe2O3(SO2-4, Sn, Zn) sensing material. The results also suggest that under a given condition, the gas sensitivity of α-Fe2O3(SO2-4, Sn, Zn) to CO can be optimised by properly adjusting the doped Zn content.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalSensors and Actuators B: Chemical
Issue number2-3
Publication statusPublished - 15 May 1997
Externally publishedYes


  • α-FeO-based sensor
  • CO gas
  • Doping of Zn and Sn
  • Gas sensitivity

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