Design of selective gas sensors using electrospun Pd-doped SnO2 hollow nanofibers
Design of selective gas sensors using electrospun Pd-doped SnO2 hollow nanofibers
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DOI：
10.1016/j.snb.2010.07.013
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发表时间：
2010-09-21
影响因子：
8.4
通讯作者：
Lee, Jong-Heun
中科院分区：
文献类型：
--
作者：
Choi, Joong-Ki;Hwang, In-Sung;Lee, Jong-Heun
采用单毛细管静电纺丝法制备了未掺杂和Pd掺杂的SnO 2中空纳米纤维，并对其对100 ppm H-2、100 ppm CO、500 ppm CH 4、气体响应和响应动力学与传感器温度和Pd掺杂浓度密切相关。掺杂的SnO 2纳米纤维在385和440 ℃下显示出对C2 H5 OH的选择性检测。在0.4wt%Pd掺杂的SnO 2气敏传感器中，在440 ℃下对CH 4和H-2的选择性检测被优化，对C2 H5 OH的交叉灵敏度最小。通过组合控制电纺中空纳米纤维中的Pd掺杂浓度和传感器温度来调谐气体选择性与气体传感机制有关（C）2010 Elsevier B V保留所有权利。
Undoped and Pd-doped SnO2 hollow nanofibers were prepared by single capillary electrospinning and their gas sensing characteristics for 100 ppm H-2, 100 ppm CO, 500 ppm CH4, and 100 ppm C2H5OH were investigated The gas responses and responding kinetics were closely dependent upon the sensor temperature and Pd doping concentration The undoped and 0.08 wt% Pd-doped SnO2 nanofibers showed selective detection to C2H5OH at 385 and 440 degrees C. In the 0.4 wt% Pd-doped SnO2 nanofiber sensor, the selective detection to CH4 and H-2 was optimized at 440 degrees C with the minimum cross-sensitivity to C2H5OH. The tuning of gas selectivity via the combinatorial control of Pd doping concentration and sensor temperature in the electrospun hollow nanofibers was discussed in relation to the gas sensing mechanism (C) 2010 Elsevier B V All rights reserved.