Ultraselective and ultrasensitive detection of trimethylamine using MoO3 nanoplates prepared by ultrasonic spray pyrolysis
- Authors
- Cho, Yoon Ho; Ko, You Na; Kang, Yun Chan; Kim, Il-Doo; Lee, Jong-Heun
- Issue Date
- 5월-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Gas sensors; Trimethylamine; MoO3 nanoplates; Ultrasonic spray pyrolysis; Selective detection
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.195, pp.189 - 196
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 195
- Start Page
- 189
- End Page
- 196
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/98635
- DOI
- 10.1016/j.snb.2014.01.021
- ISSN
- 0925-4005
- Abstract
- An ultraselective and ultrasensitive trimethylamine (TMA) sensor was achieved using MoO3 nanoplates-prepared by ultrasonic spray pyrolysis followed by a heat treatment at 450 degrees C. The small and thin MoO3 nanoplates with gas-accessible structures showed an unusually high response to 5 ppm TMA (ratio of resistance to air and gas =373.74) at 300 degrees C with detection limit as low as 45 ppb. Moreover, the ratios of the cross-responses to interfering gases (i.e., 5 ppm C2H5 OH, CO, CH4, C-3 H-8, H-2, and NO2) to the response to 5 ppm TMA were extremely low (0.008-0.016). The source of the ultraselective and highly sensitive detection of TMA with negligible interference from other gases is discussed with respect to the acid/base properties, size, and morphology of the MoO3 sensing materials. (C) 2014 Elsevier B.V. All rights reserved.
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