Conductometric ppb-Level CO Sensors Based on In2O3 Nanofibers Co-Modified with Au and Pd Species

Wenjiang Han; Jiaqi Yang; Bin Jiang; Xi Wang; Chong Wang; Lanlan Guo; Yanfeng Sun; Fangmeng Liu; Peng Sun; Geyu Lu

doi:10.3390/nano12193267

Nanomaterials (Sep 2022)

Conductometric ppb-Level CO Sensors Based on In2O3 Nanofibers Co-Modified with Au and Pd Species

Wenjiang Han,
Jiaqi Yang,
Bin Jiang,
Xi Wang,
Chong Wang,
Lanlan Guo,
Yanfeng Sun,
Fangmeng Liu,
Peng Sun,
Geyu Lu

Affiliations

Wenjiang Han: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Jiaqi Yang: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Bin Jiang: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Xi Wang: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Chong Wang: College of Communication Engineering, Jilin University, Changchun 130022, China
Lanlan Guo: School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Yanfeng Sun: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Fangmeng Liu: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Peng Sun: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
Geyu Lu: State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China

DOI: https://doi.org/10.3390/nano12193267
Journal volume & issue: Vol. 12, no. 19
p. 3267

Abstract

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Carbon monoxide (CO) is one of the most toxic gases to human life. Therefore, the effective monitoring of it down to ppb level is of great significance. Herein, a series of In2O3 nanofibers modified with Au or Pd species or simultaneous Au and Pd species have been prepared by electrospinning combined with a calcination process. The as-obtained samples are applied for the detection of CO. Gas-sensing investigations indicate that 2 at% Au and 2 at% Pd-co-modified In2O3 nanofibers exhibit the highest response (21.7) to 100 ppm CO at 180 °C, and the response value is ~8.5 times higher than that of pure In2O3 nanofibers. More importantly, the detection limit to CO is about 200 ppb with a response value of 1.23, and is obviously lower than that (6 ppm) of pure In2O3 nanofibers. In addition, the sensor also shows good stability within 19 days. These demonstrate that co-modifying In2O3 nanofibers with suitable amounts of Pd and Au species might be a meaningful strategy for the development of high-performance carbon monoxide gas sensors.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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