Journal
CHEMISTRYSELECT
Volume 3, Issue 16, Pages 4495-4500Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201703046
Keywords
Coating; Mechanism; RGO; Selectively exposed crystal plane; ZnO
Categories
Funding
- Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- Hunan Collaborative Innovation Center of Environmental and Energy Photocatalysis
- National Natural Science Foundation of China [21541003, 21671026]
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Graphene/ZnO composite attracting increasing attention due to great photoelectrochemical performance, however, graphene nanosheets tend to be coated on the one crystal plane of ZnO is rarely investigated. Herein, we synthesized different ZnO micro-nanoparticles with selectively exposed crystal facet through a hydrothermal process by controlled some parameters such as temperature, concentration of reagents and reaction time, and the corresponding RGO/ZnO composites were obtained. Characterization by SEM and TEM, it was first time demonstrate that graphene nanosheets were tend to be coated on the (100) and (002) crystal facets of ZnO micro-nanoparticles. We further discover that the largest exposed crystal facet of RGO/ZnO became (101) crystal plane. Regarding their performance in photocatalytic RhB degradation, exposed crystal facets of ZnO were found to impose crucial influence: the sample's photoelectrochemical properties are positively related to exposed degree of (101) facet, and it trend follows the order ZnO101 > RGO/ZnO101 > ZnO100 > RGO/ZnO100 > RGO/ZnO002 > ZnO002. Moreover, it can provide a new strategy that the films were coated on suitable crystal facet to change the photoelectrochemical properties of composite.
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