Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 42, Pages 14950-14961Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201602578
Keywords
electron transfer; photocatalysis; photoluminescence; Raman spectroscopy; surface plasmon resonance
Categories
Funding
- Ministry of Science and Technology of the Republic of China [MOST 104-2112-M-110-005]
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The synthesis of noble metal/semiconductor hybrid nanostructures for enhanced catalytic or superior optical properties has attracted a lot of attention in recent years. In this study, a facile and all-solution-processed synthetic route was employed to demonstrate an Au/ZnO platform with plasmonic-enhanced UV/Vis catalytic properties while retaining strengthened luminescent properties. The visible-light response of photocatalysis is supported by localized surface plasmon resonance (LSPR) excitations while the enhanced performance under UV is aided by charge separation and strong absorption. The enhancement in optical properties is mainly due to local field enhancement effect and coupling between exciton and LSPR. Luminescent characteristics are investigated and discussed in detail. Recyclability tests showed that the Au/ZnO substrate is reusable by cleaning and has a long shelf life. Our result suggests that plasmonic enhancement of photocatalytic performance is not necessarily a trade-off for enhanced near-band-edge emission in Au/ZnO. This approach may give rise to a new class of versatile platforms for use in novel multifunctional and integrated devices.
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