Silver-decorated titanium dioxide nanotube arrays with improved photocatalytic activity for visible light irradiation

Silver-decorated titanium dioxide (Ag/TiO2) nanotube (NT) arrays were successfully prepared using a two-step synthesis route comprised of an anodic oxidation procedure followed by photochemical reduction using ultraviolet irradiation. The resulting Ag/TiO2 NT arrays were characterized using scanning...

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Bibliographic Details
Published in:Journal of materials research 2014-06, Vol.29 (11), p.1302-1308
Main Authors: Chen, Kansong, Feng, Xinran, Tian, Han, Li, Yang, Xie, Kun, Hu, Rui, Cai, Yaxuan, Gu, Haoshuang
Format: Article
Language:English
Subjects:
Analysis
Applied and Technical Physics
Aqueous solutions
Arrays
Biomaterials
Electrodes
Electrons
Inorganic Chemistry
Irradiation
Light
Light absorption
Materials Engineering
Materials research
Materials Science
Morphology
Nanoparticles
Nanostructure
Nanotechnology
Nanotubes
New technology
Oxidation
Photocatalysis
Silver
Studies
Titanium alloys
Titanium dioxide
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Summary:Silver-decorated titanium dioxide (Ag/TiO2) nanotube (NT) arrays were successfully prepared using a two-step synthesis route comprised of an anodic oxidation procedure followed by photochemical reduction using ultraviolet irradiation. The resulting Ag/TiO2 NT arrays were characterized using scanning electron microscopy, transmission electron microscopy, x-ray diffraction, and UV-vis diffusion reflectance spectrometry. The characterization results indicated that the silver decoration significantly enhanced the light absorption capability of the TiO2 NT arrays in the visible spectral range. The visible light photocatalytic activity of the subject NT arrays was investigated. The experimental results showed the photocatalytic activity of silver-decorated titanium dioxide Ag/TiO2 NT arrays to be dependent on the size of the silver particles. The improved visible light absorption can be attributed to plasmonic effects induced by particle size phenomenon. The Ag/TiO2 NT arrays exhibit promising application for photocatalytic degradation of dye solutions and pollutants in water using visible irradiation.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2014.116