静电纺丝法制备钇掺杂的ZnO及其对丙酮的气敏特性研究-《郑州大学学报(工学版)》

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Title:: Preparation and Acetone Sensitivities of Y-doped ZnO Nanofibers by Electrispinning

作者:: 冯秋霞1; 于鹏2; 王兢2; 李晓干2; 1.大连理工大学电子科学与技术学院,辽宁大连116023;2.大连东软信息学院电子工程系,辽宁大连116023;3.大连理工大学电子科学与技术学院,辽宁大连,116023

Author(s):: Feng Qiuxia1; Yu Peng2; Wang Jing2; Li Xiaoqian2; 1. School of Electronic Science and Technology, Dalian University of Technology, Dalian, Liaoning 116023; 2. Department of Electronic Engineering, Dalian Neusoft Institute of Information, Dalian, Liaoning 116023; 3. School of Electronic Science and Technology, Dalian University of Technology, Dalian, Liaoning 116023

摘要:: 为改善ZnO对丙酮的气敏响应,采用静电纺丝法,利用PVP/Zn(NO3)·6H2O/Y(NO3)3·6H2O等制成的前驱液,制备了钇掺杂的ZnO纳米纤维,通过XRD、SEM等表征手段对制备的纯ZnO和掺杂的ZnO样品进行了表征分析.将制备的纯ZnO和钇掺杂的ZnO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ZnO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 using a precursor solution made of PVP/Zn(NO3) 6H2O/Y(NO3)3 6H2O, etc. The prepared pure ZnO and doped ZnO samples were characterized by XRD, SEM and other characterization methods. The prepared pure ZnO and yttrium-doped ZnO nanofibers were made into resistive gas sensors. The gas sensor test results showed that Y Doping effectively improves the sensitivity of ZnO nanofibers to acetone gas. At 440 °C, it has a good response to 1×10-6-200×10-6 (volume fraction) acetone, and the response time is 14-40 s. The recovery time is 20-55 s, the response value to 100×10-6 acetone is about 70 (S=Ra/Rg), and it has good selectivity to ethanol, ammonia, methanol, formaldehyde, toluene and benzene. At the same time, the sensitivity mechanism of the material to acetone was analyzed.