Simple Method to Fabricate Au Nanoparticle-Decorated TiO<sub>2</sub> Nanotube Arrays for Enhanced Visible Light Photocurrent

doi:10.1088/0256-307X/32/10/108101

Chin. Phys. Lett.

2015, Vol. 32

Issue (10): 108101 DOI: 10.1088/0256-307X/32/10/108101

CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY

Simple Method to Fabricate Au Nanoparticle-Decorated TiO₂ Nanotube Arrays for Enhanced Visible Light Photocurrent

LU Yu-Hua, WANG Wen-Gui, WENG Yu-Yan, DONG Wen^**

Jiangsu Key Laboratory of Thin Films and Department of Physics, Soochow University, Suzhou 215006

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LU Yu-Hua, WANG Wen-Gui, WENG Yu-Yan et al 2015 Chin. Phys. Lett. 32 108101

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Abstract Au nanoparticle-decorated TiO₂ nanotube arrays are prepared by a simple method, which is a thermal annealing thin gold film deposited on anodic oxidized TiO₂ nanotube arrays. These electron microscope images present that Au nanoparticles are well dispersed within the wall and on the surface of the TiO₂ nanotubes. Meanwhile, the morphologies of Au nanoparticles can be controlled by changing the thickness of the deposited gold film. Associated with the excitation of localized surface plasmon resonances, the prepared Au nanoparticle-decorated TiO₂ nanotube arrays could work as visible light responsive photocatalysts to produce a greatly enhanced photocurrent density. By varying the initial gold film thickness, such Au nanoparticle-decorated TiO₂ nanotube arrays could be optimized to obtain the highest photocurrent generation efficiency in the visible and UV light regions.

Received: 22 May 2015 Published: 30 October 2015

PACS:	81.07.De	(Nanotubes)
	81.05.Hd	(Other semiconductors)
	84.60.Jt	(Photoelectric conversion)

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	LU Yu-Hua
	WANG Wen-Gui
	WENG Yu-Yan
	DONG Wen

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