静电纺丝法制备钇掺杂的ZnO及其对丙酮的气敏特性研究

发布时间：2018-04-08 21:06

  本文选题：静电纺丝法　切入点：ZnO纳米纤维　出处：《郑州大学学报(工学版)》2016年02期

【摘要】：为改善Zn O对丙酮的气敏响应,采用静电纺丝法,利用PVP/Zn(NO_3)·6H_2O/Y(NO_3)_3·6H_2O等制成的前驱液,制备了钇掺杂的Zn O纳米纤维,通过XRD、SEM等表征手段对制备的纯Zn O和掺杂的Zn O样品进行了表征分析.将制备的纯Zn O和钇掺杂的Zn O纳米纤维制成电阻型气体传感器.气敏测试结果表明,Y掺杂有效改善了Zn O纳米纤维对丙酮气体的敏感特性.在440℃时,对1×10~(-6)~200×10~(-6)(体积分数)丙酮具有良好的响应,响应时间为14~40 s,恢复时间为20~55 s,对于100×10~(-6)丙酮的响应值约为70(S=Ra/Rg),并且对于乙醇、氨气、甲醇、甲醛、甲苯、苯有较好的选择性.同时分析了该材料对丙酮的敏感机理.
[Abstract]:In order to improve the gas sensing response of Zno to acetone, yttrium doped ZnO nanofibers were prepared by electrospinning method and precursor solution of PVP / ZnNo3 6H_2O/Y(NO_3)_3 6H_2O.The pure and doped Zno samples were characterized by XRD SEM.A resistive gas sensor was prepared from pure Zn O and Y doped ZnO nanofibers.The gas sensitivity test results show that Y doping can effectively improve the sensitivity of Zno nanofibers to acetone gas.At 440 鈩，

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