Highly sensitive acetone sensors based on La-doped α-Fe2O3 nanotubes

被引：81
作者：
Shan, Hao [1 ]
Liu, Changbai [2 ]
Liu, Li [1 ]
Li, Shouchun [1 ]
Wang, Lianyuan [1 ]
Zhang, Xiaobo [1 ]
Bo, Xiaoqing [1 ]
Chi, Xiao [1 ]
机构：
[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
[2] Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 184卷
关键词：
La; alpha-Fe2O3; Nanotubes; Acetone; Gas sensor; GAS-SENSING PROPERTIES; ZNO NANORODS; TEMPERATURE; NANOPARTICLES; NO2;
D O I：
10.1016/j.snb.2013.04.088
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Pure and La-doped (5 wt%, 7 wt% and 10 wt%) alpha-Fe2O3 nanotubes are synthesized by an electrospinning method and followed by calcination. The as-synthesized nanotubes are characterized by scanning electron microscope (SEM) and X-ray powder diffraction (XRD). Compared with pure alpha-Fe2O3 nanotubes, La-doped alpha-Fe2O3 nanotubes exhibit improved acetone sensing properties at 240 degrees C. The response of 7 wt% La-doped alpha-Fe2O3 nanotubes to 50 ppm acetone is about 26, which is 10 times larger than that of pure alpha-Fe2O3 nanotubes. The response and recovery times of 7 wt% La-doped alpha-Fe2O3 nanotubes to 50 ppm acetone are about 3 and 10 s, respectively. Moreover, 7 wt% La-doped alpha-Fe2O3 nanotubes show a good selectivity to acetone. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：243 / 247
页数：5
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