期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 282, 期 -, 页码 339-346出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.11.070
关键词
SnO2/Zn2SnO4; Hydrothermal method; Porous sphere; Gas sensor; Ethanol
资金
- National Key Research and Development Program [2016YFC0207300]
- National Nature Science Foundation of China [61722305, 61503148, 61520106003, 61327804]
- Science and Technology Development Program of Jilin Province [20170520162JH]
- China Postdoctoral Science Foundation [2017T100208, 2015M580247]
- Program for JLU Science and Technology Innovative Research Team
- Fundamental Research Funds for the Central Universities
In this work, hierarchucal porous SnO2/Zn2SnO4 nanospheres were succesfully prepared via a facile one-step hydrothermal method with subsequent calcination process. Scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed in order to investigate the structural and morphological properties of the as-prepared composites. The results showed that the SnO2/Zn2SnO4 composites were cpmposed of many porous nanospheres with a uniform diameter of about 500 nm. Moreover, the as-prepared products were used as sensing material for the fabrication of gas sensor. The sensing performance of the sensor was systematically evaluated, and the sensor exhibited excellent ethanol-sensing property. The optimum operating temperature was 250 degrees C with a reponse of 30.5 toward 100 ppm ethanol. Also, the sensor showed good selectivity, stability and a low detection limit of 0.5 ppm (response 1.4). The good sensing performance of SnO2/Zn2SnO4 nanospheres can be attibuted to the porous structure as well as the heterojunction formed between SnO2 and ZnSn2O4.
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