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Surface-Plasmon-Enhanced Band Emission and Enhanced Photocatalytic Activity of Au Nanoparticles-Decorated ZnO Nanorods.
- Source :
- Plasmonics; Dec2015, Vol. 10 Issue 6, p1373-1380, 8p
- Publication Year :
- 2015
-
Abstract
- We reported a simple hydrothermal method to fabricate Au nanoparticles-decorated ZnO nanorods (ZnO-NRs) using aligned ZnO-NRs arrays as a template. Via changing the concentration of HAuCl aqueous solution, the size and density of Au nanoparticles (NPs) on the surface of ZnO-NRs could be readily tuned. The photoluminescence of Au-NPs decorated ZnO-NRs were investigated, in order to optimize the configuration of the Au-NPs decorated ZnO-NRs system realizing the maximum band emission. Due to a synergistic effect of the adjacent Au NPs and ZnO-NRs and efficiently coupled localized surface plasmon resonance (SPR) excitation, an optimized sample employing Au NPs with 15-nm size showed best catalytic efficiency. We have proposed a mechanism that is the electron transfer from surface-plasmon-stimulated \Au NPs to the conduction band of ZnO-NRs. These results demonstrate that Au NPs can significantly enhance the charge separation by extracting electrons from the photoexcited ZnO and consequently improve the photocatalytic activity of the composites. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15571955
- Volume :
- 10
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Plasmonics
- Publication Type :
- Academic Journal
- Accession number :
- 110932321
- Full Text :
- https://doi.org/10.1007/s11468-015-9933-2