Citation: FENG Qiu-Xia, YU Peng, WANG Jing, LI Xiao-Gan. Preparation of Y-Doped ZnO Nanofibers and Sensing Mechanism of the Gas Sensors[J]. Acta Physico-Chimica Sinica, ;2015, 31(12): 2405-2412. doi: 10.3866/PKU.WHXB201510261 shu

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

FENG Qiu-Xia ^1,2 ,
YU Peng ¹ ,
WANG Jing ^1,, ,
LI Xiao-Gan ^1,,

1.
1 School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China;
2.
2 Department of Electronic Engineering, Dalian Neusoft University of Information, Dalian 116023, Liaoning Province, P. R. China

Corresponding author: WANG Jing, LI Xiao-Gan,
Received Date: 9 September 2015
Available Online: 23 October 2015
Fund Project: 国家自然科学基金(61474012, 61176068, 61574025, 61131004)资助项目 (61474012, 61176068, 61574025, 61131004)

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.
- Gas sensor,
- ZnO nanofiber,
- Y dopant,
- Electrospinning,
- Acetone
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