Zhang Jitao, Zhu Zijian, Chen Changmiao, Chen Zhi, Cai Mengqiu, Qu Baihua, Wang Taihong, Zhang Ming
Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha 410082, People's Republic of China.
Nanotechnology. 2018 Jul 6;29(27):275501. doi: 10.1088/1361-6528/aabd72. Epub 2018 Apr 11.
Hydrogen sulfide (HS), as a typical atmospheric pollutant, is neurotoxic and flammable even at a very low concentration. In this study, we design stable HS 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 HS sensors show excellent selectivity and response compared to the pure ZnO nanofiber HS sensors, particularly the response in the range of 102-50 ppm of HS. Besides, they exhibited a nearly constant response of approximately 40-20 ppm of HS over 60 days. The superior performance of these HS 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 HS. The good performance of ZnO-carbon HS 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.
硫化氢（HS）作为一种典型的大气污染物，即使在极低浓度下也具有神经毒性且易燃。在本研究中，我们设计了基于氧化锌-碳纳米纤维的稳定HS传感器。通过简便的电纺丝路线制备含30.34 wt%碳的纳米纤维，随后进行退火处理。与纯氧化锌纳米纤维HS传感器相比，所得的HS传感器表现出优异的选择性和响应性，特别是在102 - 50 ppm的HS范围内的响应。此外，它们在60天内对约40 - 20 ppm的HS表现出近乎恒定的响应。这些HS传感器的优异性能可归因于碳的保护作用，其确保了氧化锌的高稳定性，以及氧空位，氧空位提高了对HS的响应和选择性。氧化锌-碳HS传感器的良好性能表明，通过简便的电纺丝路线制备的具有氧空位的复合材料可能为气体传感器、光催化剂和半导体器件领域提供一种新的研究策略。
