纳米纤维
静电纺丝
乙醇
选择性
化学工程
材料科学
异质结
纳米技术
化学
有机化学
催化作用
聚合物
复合材料
光电子学
工程类
作者
Dongdong Chen,Zhou Li,Xin Jin,Jianxin Yi
出处
期刊:Chinese Journal of Chemical Physics
[American Institute of Physics]
日期:2017-08-01
卷期号:30 (4): 474-478
被引量:9
标识
DOI:10.1063/1674-0068/30/cjcp1704080
摘要
SnO2 nanofibers were synthesized by electrospinning and modified with Co3O4 via impregnation in this work. Chemical composition and morphology of the nanofibers were systematically characterized, and their gas sensing properties were investigated. Results showed that Co3O4 modification significantly enhanced the sensing performance of SnO2 nanofibers to ethanol gas. For a sample with 1.2 mol% Co3O4, the response to 100 ppm ethanol was 38.0 at 300 °C, about 6.7 times larger than that of SnO2 nanofibers. In addition, the response/recovery time was also greatly reduced. A power-law dependence of the sensor response on the ethanol concentration as well as excellent ethanol selectivity was observed for the Co3O4/SnO2 sensor. The enhanced ethanol sensing performance may be attributed to the formation of p-n heterojunctions between the two oxides.
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