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Design of selective gas sensors using electrospun Pd-doped SnO2 hollow nanofibers

Authors
Choi, Joong-KiHwang, In-SungKim, Sun-JungPark, Joon-ShikPark, Soon-SupJeong, UnyongKang, Yun ChanLee, Jong-Heun
Issue Date
21-9월-2010
Publisher
ELSEVIER SCIENCE SA
Keywords
Gas sensors; Electrospinning; Selective detection; Hollow nanofibers; Pd-SnO2
Citation
SENSORS AND ACTUATORS B-CHEMICAL, v.150, no.1, pp.191 - 199
Indexed
SCIE
SCOPUS
Journal Title
SENSORS AND ACTUATORS B-CHEMICAL
Volume
150
Number
1
Start Page
191
End Page
199
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/115665
DOI
10.1016/j.snb.2010.07.013
ISSN
0925-4005
Abstract
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.
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