期刊
APPLIED SURFACE SCIENCE
卷 423, 期 -, 页码 721-727出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.06.160
关键词
NO2; Gas sensing; Room temperature/(25 degrees C); ZnO/rGO
类别
资金
- National Natural Science Foundation of China [51072156, 51202177]
- Science & Research Fund of Education Commission of Shaanxi Province [15JK1353]
- Industrial Public Relation Project of Shaanxi Technology Committee [2016GY-206]
A highly sensitive NO2 gas sensor based on ZnO nanowalls decorated rGO nanosheets was fabricated using a thermal reduction and soft solution process. The highly developed interconnected microporous networks of ZnO nanowalls were anchored homogeneously on the surface of reduced graphene oxide (rGO). Sensors fabricated with heterojunction structures achieved a higher response (S = 9.61) and shorter response-recovery (25 s, 15 s) behavior at room temperature to 50 ppm level NO2 effectively in contrast to those sensors based on net ZnO nanowalls or rGO layers. The stability and selectivity of ZnO/rGO heterojunction were carried out. Meanwhile, the effects of humidity on ZnO/rGO heterojunction gas sensor were investigated. The more preferable sensing performance of ZnO/rGO heterojunction to NO2 was discussed. It can be surmised that this NO2 gas sensor has potential for use as a portable room temperature gas sensor. (C) 2017 Elsevier B.V. All rights reserved.
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