期刊
MATERIALS & DESIGN
卷 98, 期 -, 页码 324-332出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.03.027
关键词
ZnO; Photocatalyst; Heterogeneous; Solvothermal; Reduced graphene oxide
资金
- National Natural Science Foundation of China [51202142, 51202144]
- Major State Basic Research Development Program of China (973 Program) [201403643306]
- National High Technology Research and Development Program of China (863 Program) [2013A2041106]
- National Natural Science Foundation of Shanghai [14ZR1419800]
- Marine Project of Science and Technology Commission of Shanghai Municipality [14DZ1205802]
- Science and Technology Commission of Shanghai Municipality [12231204102]
- Shanghai Education Commission [12YZ113]
- Peak Plateau Project of Shanghai
A series of ZnO-based heterogeneous photocatalysts, including Ag-ZnO, ZnO- and Ag-ZnO-reduced graphene oxide (rGO) nanocomposites, was successfully synthesized by a one-pot solvothermal route. The as synthesized products were systematically characterized using combined techniques of X-ray diffraction, X-ray photoelectron spectrometry, electron microscopy, and energy dispersive spectrometry. The resulting ZnO-based photocatalysts exhibited selective photocatalytic behavior towards the degradation of different organic dyes under solar light irradiation. Compared with plain ZnO nanoparticles, the heterogeneous nanocomposite photocatalysts of Ag-ZnO, ZnO- and Ag-ZnO-rGO showed significantly improved photocatalytic activities. The Ag-ZnO nanocomposite exhibited the highest photocatalytic efficiency, which can be ascribed to its core-shell structure with strong interfacial coupling between the Ag shell and the ZnO core as well as the surface plasmon resonance effect of the Ag. The ZnO- and Ag-ZnO-rGO nanocomposites displayed excellent recyclability, due to the strongly coupled interactions between the ZnO or Ag nanoparticles and the rGO support. The ZnO-rGO nano composite is the most promising candidate for photocatalysis application with excellent comprehensive performance. This study will not only provide guidance for the selection of ZnO-based heterogeneous photocatalysts, but also open new opportunities for the synthesis of other heterogeneous photocatalysts. (C) 2016 Elsevier Ltd. All rights reserved.
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