期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 46, 页码 23501-23511出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta06955f
关键词
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资金
- Natural Science Foundation of China [21173047, 21373049, 21473066, 21033003]
- 973 Program of China [2013CB632405]
- Natural Science Foundation of Anhui Province, China [1408085QB38]
Intensifying the Eight harvesting and promoting the separation of photoinduced charge carriers are effective strategies to boost photocataEyst performance. Inspired by these insights, a hybrid photocataEyst was fabricated in this work by the deposition of Au nanopartides (NPs) on a ZnO photonic crystaE (ZnO-PC). The photonic band-gap of the ZnO-PC was tuned experimentlly by Bragg's Law to couple the slow photon (SP) effect of the ZnO-PC with the surface plasmon resonance (SPR) of Au NPs. Transmission spectra results indicated that, when the SP effect of the ZnO-PC matched well with the SPR of Au NPs, the visible Eight absorption of Au NPs could be substantiay ampilified. The hybrid Au/ZnO-PC showed high photocatalytic activity for the degradation of RhB under visible Eight irradiation, and the degradation kinetic constant (1.42 h(-1)) is ca. 5.6-fold higher than that of the famous N doped TiO2 (TiO2-xNx 0.22 h(-1)) and 24.8-fold higher than that of the commercial ZnO NPs (0.05 h(-1)). The synergistic effects of the SPR of Au, the SP effect of the ZnO-PC, and the heterostructures between ZnO and Au NPs account for the high photocatalytic performance, which can enhance the harvesting of visible Eight and promote the separation of charge carriers. A possible reaction mechanism was tentatively proposed based on the active species analysis result. The work not only provides an effective route to enhance photocatalytic efficiency, but also contributes to a better understanding of the role of PCs in the photocatalytic reaction.
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