Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 182, Issue 12, Pages 3238-3242Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2009.09.016
Keywords
TiO2; Nanotube arrays; Zirconium; Anodic oxidation; Electrochemistry
Funding
- National Natural Science Foundation of China [20677012]
- Scientific Research Project of Guangdong Province [2006A36701003]
- government key project of water pollution controlling of China [2008ZX07211-005-03]
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This paper described a new method for the preparation of Zr doped TiO2 nanotube arrays by electrochemical method. TiO2 nanotube arrays were prepared by anodization with titanium anode and platinum cathode. Afterwards, the formed TiO2 nanotube arrays and Pt were used as cathode and anode, respectively, for preparation of Zr/TiO2 nanotube arrays in the electrolyte of 0.1 M Zr(NO3)(4) with different voltage and post-calcination process. The nanotube arrays were characterized by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS) and UV-Vis diffusion reflection spectra (DRS). The photocatalytic activities of these nanotubes were investigated with Rhodamine B as the model pollutant and the results demonstrated that the photocatalytic efficiency of Zr doped TiO2 nanotubes was much better than that of TiO2 nanotubes under UV irradiation. Zr/TiO2 nanotube arrays doped at 7 V and calcined at 600 degrees C (denoted as TiO2-7 V-600) achieved the best photocatalytic efficiency and the most optimal doping ratio was 0.047 (Zr/Ti). TiO2-7 V-600 could be reused for more than 20 times and maintained good photocatalytic activities. (C) 2009 Elsevier Inc. All rights reserved.
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