物理化学学报 >> 2015, Vol. 31 >> Issue (12): 2405-2412.doi: 10.3866/PKU.WHXB201510261

材料物理化学 上一篇    下一篇

Y掺杂的ZnO纳米纤维材料的制备及其气敏传感器作用机理

冯秋霞1,2,于鹏1,王兢1,*(),李晓干1,*()   

  1. 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
  • 收稿日期:2015-09-09 发布日期:2015-12-04
  • 通讯作者: 王兢,李晓干 E-mail:wangjing@dlut.edu.cn;lixg@dlut.edu.cn
  • 基金资助:
    国家自然科学基金(61474012, 61176068, 61574025, 61131004)

Preparation of Y-Doped ZnO Nanofibers and Sensing Mechanism of the Gas Sensors

Qiu-Xia. FENG1,2,Peng. YU1,Jing. WANG1,*(),Xiao-Gan. LI1,*()   

  1. 1 School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China
    2 Department of Electronic Engineering, Dalian Neusoft University of Information, Dalian 116023, Liaoning Province, P. R. China
  • Received:2015-09-09 Published:2015-12-04
  • Contact: Jing. WANG,Xiao-Gan. LI E-mail:wangjing@dlut.edu.cn;lixg@dlut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(61474012, 61176068, 61574025, 61131004)

摘要:

采用静电纺丝法成功制备了Y掺杂的ZnO纳米纤维.并通过X射线衍射(XRD),扫描电子显微镜(SEM),能量色散X射线(EDX),透射电子显微镜(TEM)以及热重差热分析(TG-DTA)等手段对样品的结构和形貌进行了表征分析.同时用纯的ZnO和Y掺杂的ZnO纳米纤维制备了传感器,对浓度为(1-200)×10-6 (体积分数)丙酮的气敏特性进行了测试分析.测试结果表明,可以通过简单控制纳米纤维中Y的含量,来微调该传感器的气敏特性.同时也发现通过Y掺杂, ZnO纳米纤维对丙酮的气敏特性有所改善,表现出很高的响应.纯ZnO和Y掺杂ZnO制成的传感器对几种潜在干扰气体表现出良好的选择性,比如氨气、苯、甲醛、甲苯以及甲醇.本文最后也讨论了该传感器的气敏作用机理.

关键词: 气体传感器, ZnO纳米纤维, Y掺杂, 静电纺丝, 丙酮

Abstract:

Y-doped ZnO nanofibers were synthesized by an electrospinning method. The structure and morphology of the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), and thermogravimetric/differential thermal analysis (TG-DTA). The sensitivity of the pure and Y-doped ZnO nanofibers towards acetone from 1×10-6 to 200×10-6 (volume fraction) was investigated. Fine tuning of the sensing ability of the ZnO nanofibres was possible by controlling the amount of Y loaded in the nanofibers. The ZnO nanofibers doped with Y exhibited very high responses towards acetone. Both the pure and Y-doped ZnO sensors showed selectivity towards several potential interferent gases, including ammonia, benzene, formaldehyde, toluene, and methanol. The sensing mechanism is discussed.

Key words: Gas sensor, ZnO nanofiber, Y dopant, Electrospinning, Acetone

MSC2000: 

  • O641