期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 240, 期 -, 页码 664-673出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.09.024
关键词
Hydrothermal method; Au-loaded SnO2; Gas sensing performance; Hydrogen sensor
资金
- National Natural Science Foundation of China [51205274, 51205276]
- National Natural Science of Shanxi Province [2016011039]
- Talent project of Shanxi Province [201605D211020]
- Technology Foundation for Selected Overseas Shanxi Scholar [[2014] 95]
- Science and Technology Major Project of the Shanxi Science and Technology Department [20121101004]
- Key Disciplines Construction in Colleges and Universities of Shanxi [[2012] 45]
Pristine tin dioxide (SnO2) and Au-loaded SnO2 composite nanoparticles were synthesized by a simple hydrothermal method. The phase structure, composition, and morphology of synthesized Au-loaded SnO2 composite nanoparticles were comprehensively investigated. Furthermore, the gas sensing performance of the as-prepared pristine and Au-loaded SnO2 gas sensors toward low concentration of hydrogen (H-2) were systematically evaluated. The results indicated that compared to the pristine SnO2 gas sensor, the Au-loaded SnO2 composite nanoparticles could not only significantly improve the gas sensing response, but also decrease the optimum working temperature. Moreover, the experimental results showed that the 4.0 at.% Au-loaded SnO2 gas sensor exhibited the highest response (25) to 100 ppm H-2 at 250 degrees C, which was about five times higher than that of the pristine one. In addition, it also provided a rapid response/recovery time (1s/3s) and a low detection limit (1 ppb). Therefore, Au-loaded Sn02 composite nanoparticles are more suited for hydrogen detection compared to pristine Sn02 gas sensor. (C) 2016 Elsevier B.V. All rights reserved.
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