期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 249, 期 -, 页码 715-724出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.04.190
关键词
Zinc oxide; Graphene; Gas sensor; Nitrogen dioxide; Metal oxide semiconductor
资金
- National Nature Science Foundation of China [61304242, 61327804, 61377058, 61374218]
- National High-Tech Research and Development Program of China (863 Program) [2014AA06A505]
- Science and Technology Development Program of Jilin Province [20150520091JH]
Hierarchical rGO/ZnO hybrids with a flower-like morphology of ZnO and flexible rGO sheets were synthesized by a facile solution-processed method. The structures and morphologies of the hybrids were investigated by different kinds of techniques, including X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy, and energy dispersive spectroscopy. The gas sensing properties of hierarchical rGO/ZnO hybrids toward nitrogen dioxide were studied via a static system. The response of rGO/ZnO hybrids to 50 ppb NO2 was 12, which was seven times higher than that of pristine ZnO at 100 degrees C. The limit of detection could be achieved as low as 5 ppb. The enhanced sensor response was attributed to the presence of local p-n heterojunctions between rGO sheets and hierarchical structure of ZnO. (C) 2017 Elsevier B.V. All rights reserved.
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