期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 344, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.130309
关键词
Sb-doping; Ethanol sensing; High humidity; Gas sensor; In2O3
资金
- National Natural Science Foundation of China [61604116, 61803289]
- Fundamental Research Funds for the Central Universities [JC1907, XDJK2017C074]
- China Postdoctoral Science Foundation [2017M623120, 2019M653552, 2020T130491]
- Xi'an Science and Technology Plan Project [2020KJRC0016]
- Wuhu and Xidian University special fund for industry-university-research cooperation [XWYCXY012020010]
- Inner Mongolia Autonomous Region Science and Technology Plan Project [2020GG0185]
Research on the influence of different precursors and Sb concentrations on the gas sensing performance of In2O3 was conducted, with the chemical and structural properties of the material verified through various analysis methods and gas sensing tests carried out. The results show that, with appropriate molar ratios of Sb doping, In(NO3)3 as the precursor can achieve better sensing performance, holding potential application value for ethanol detection.
Different morphologies of In2O3 were synthesized by ultrasonic spray using InCl3 and In(NO3)3 as precursors. The samples using In(NO3)3 as a precursor exhibited more excellent gas sensing performance compared with InCl3. Furthermore, different molar ratios of Sb were introduced to study the influence of Sb concentration on gas sensing performance of In2O3 microspheres. All samples have been tested by SEM, TEM, ESR and other analysis methods to help verify the chemical and structural properties of the material. A series of gas sensing tests have been carried out, 2 mol% Sb ion-doped sample showed an excellent sensing performance for 100 ppm ethanol detection, with a response of 41.3, response/recovery time of 17 s/36 s. At a high humidity atmosphere (RH = 90 %), the device exhibited higher response (60.83) and better selectivity to 100 ppm ethanol. In this study, the gas sensing and humidity sensing mechanisms of Sb ions acted on the surface of In2O3 microspheres have been discussed exhaustedly. It is a significant study of gas-sensitive materials for ethanol detection.
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