掺杂对Fe2O3纳米粉体气敏性的影响

Effect of dopant on gas sensitivity of Fe2O3 nano powders

    摘要
  • 摘要: 应用双微乳液法,在聚乙二醇辛基苯基醚(TX100)/正己醇/环己烷/水体系的油包水(W/O)型微乳液中合成了掺锡和金的氧化铁前驱体,对前驱体经400℃焙烧后所得的粉体进行了表征和气敏性测试,表明制得的掺杂0.5mol%Sn和0.5mol%Au的粉体对C2H5OH气体有较好的气敏性。

     

    Abstract: The Sn/Fe2O3 and Sn/Au/Fe2O3 particles were prepared in W/O microemulsion system containing TX100/n-hexanol/cyclohexane/H2O. The powders calcined at 400℃ were characterized by XRD,Zeta potential analysis and gas sensitivity measurement.The material doped with 0.5mol%Sn-0.5mol% Au reveals the smallest crystallite size and exhibits good gas sensing response to C2H5OH.The sensitivity reaches 13 when the heating current is 110mA and the C2H5OH concentration is 1000ppm.

     

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