Enhanced NO2 detection using hierarchical porous ZnO nanoflowers modified with graphene |
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| Affiliation: | 1. Division of Physics, Faculty of Science and Agricultural Technology, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand;2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;1. Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China;2. School of Materials Science & Engineering, Harbin Institute of Technology, Harbin 150001, China;1. College of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, PR China;2. Hebei Province Key Laboratory of Environment and Catalysis Materials, Tangshan 063009, PR China;1. Czech Technical University in Prague, Faculty of Electrical Engineering, Department of Electrotechnology, Technická 2, Prague, Czech Republic;2. Institute of Plasma Physics ASCR, v.v.i., Za Slovankou 3, Prague, Czech Republic;1. Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology, Harbin 150001, PR China;2. China Aerodynamic Research and Development Center, Mianyang 621000, PR China;3. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, PR China;4. College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, PR China;1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Because of their potential applications in gas sensing and catalysis, reduced graphene oxide (RGO) and ZnO have been the focus of much recent attention. However, few reported materials have been produced via the combination of hierarchical ZnO structures with RGO to achieve high sensing performances. In this paper, a hydrothermal method was used to synthesize hierarchical porous ZnO nanoflowers, which were then combined with graphene to enhance their sensing performances. The rapid detection of 1 ppm NO2 was achieved at 174 °C. The morphologies and structures of these materials were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. Photoluminescence measurements and X-ray photoelectron spectroscopy were also used to investigate the mechanism of gas sensing by these materials. |
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| Keywords: | Hierarchical and porous structures Graphene Gas sensing |
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