Improved selective acetone sensing properties of Co-doped ZnO nanofibers by electrospinning

被引:259
作者
Liu, Li [1 ]
Li, Shouchun [1 ]
Zhuang, Juan [2 ]
Wang, Lianyuan [1 ]
Zhang, Jinbao [1 ]
Li, Haiying [1 ]
Liu, Zhen [1 ]
Han, Yu [1 ]
Jiang, Xiaoxue [3 ]
Zhang, Peng [3 ]
机构
[1] Jilin Univ, State Key Lab Superhard Mat, Coll Phys, Changchun 130012, Peoples R China
[2] Dalian Univ Technol, Sch Phys & Optoelect Engn, Dalian 116024, Peoples R China
[3] Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130012, Peoples R China
来源
SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 155卷 / 02期
关键词
ZnO; Semiconductors; Electrospinning; Nanofibers; Gas sensors; GAS SENSOR; ROOM-TEMPERATURE; METAL; FILM; NANOTUBES; FABRICATION; NANOBELTS; CATALYSIS; TEMPLATE; NANORODS;
D O I
10.1016/j.snb.2011.01.047
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Pure and Co-doped (0.3 wt%, 0.5 wt%, and 1 wt%) ZnO nanofibers are synthesized by an electrospinning method and followed by calcination. The as-synthesized nanofibers are characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray (EDX) spectroscopy. Comparing with pure ZnO nanofibers, Co-doped nanofibers exhibit improved acetone sensing properties at 360 degrees C. The response of 0.5 wt% Co-doped ZnO nanofibers to 100 ppm acetone is about 16, which is 3.5 times larger than that of pure nanofibers (about 4.4). The response and recovery times of 0.5 wt% Co-doped ZnO nanofibers to 100 ppm acetone are about 6 and 4s, respectively. Moreover, Co-doped ZnO nanofibers can successfully distinguish acetone and ethanol/methanol, even in a complicated ambience. The high response and quick response/recovery are based on the one-dimensional nanostructure of ZnO nanofibers combining with the Co-doping effect. The selectivity is explained by the different optimized operating temperatures of Co-doped ZnO nanofibers to different gases. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:782 / 788
页数:7
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