Journal
NANOTECHNOLOGY
Volume 29, Issue 27, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aabd72
Keywords
hydrogen sulfide sensor; nanofibers; ZnO; oxygen vacancies
Funding
- National Natural Science Foundation of China [51772082, 51404103, 51574117]
- China Post-doctoral Science Foundation [2017M610495]
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Hydrogen sulfide (H2S), as a typical atmospheric pollutant, is neurotoxic and flammable even at a very low concentration. In this study, we design stable H2S sensors based on ZnO-carbon nanofibers. Nanofibers with 30.34 wt% carbon are prepared by a facial electrospinning route followed by an annealing treatment. The resulting H2S sensors show excellent selectivity and response compared to the pure ZnO nanofiber H2S sensors, particularly the response in the range of 102-50 ppm of H2S. Besides, they exhibited a nearly constant response of approximately 40-20 ppm of H2S over 60 days. The superior performance of these H2S sensors can be attributed to the protection of carbon, which ensures the high stability of ZnO, and oxygen vacancies that improve the response and selectivity of H 2 S. The good performance of ZnO-carbon H2S sensors suggests that composites with oxygen vacancies prepared by a facial electrospinning route may provide a new research strategy in the field of gas sensors, photocatalysts, and semiconductor devices.
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