TY - JOUR
T1 - Electrochemical method for synthesis of a ZnFe 2O 4/TiO 2 composite nanotube array modified electrode with enhanced photoelectrochemical activity
AU - Hou, Yang
AU - Li, Xin-Yong
AU - Zhao, Qi-Dong
AU - Quan, Xie
AU - Chen, Guo-Hua
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2010/7/9
Y1 - 2010/7/9
N2 - An electrode with intimate and well-aligned ZnFe 2O 4/TiO 2 composite nanotube arrays is prepared via electrochemical anodization of pure titanium foil in fluorine-containing ethylene glycol, followed by a novel cathodic electrodeposition method. The deposition of ZnFe 2O 4 is promoted in the selfaligned, vertically oriented TiO 2 nanotube arrays but minimized at the tube entrances. Thus, pore clogging is prevented. Environmental scanning electron microscopy, energy-dispersive X-ray spectra, high-resolution transmission electron microscopy, X-ray diffraction patterns, and X-ray photoelectron spectroscopy indicate that the as-prepared samples are highly ordered and vertically aligned TiO 2 nanotube arrays with ZnFe 2O 4 nanoparticles loading. The TiO 2 nanotubes are anatase with the preferential orientation of <101> plane. Enhanced absorption in both UVand visible light regions is observed for the composite nanotube arrays. The current-voltage curve of ZnFe 2O 4-loaded TiO 2 nanotube arrays reveals a rectifying behavior. The enhanced separation of photoinduced electrons and holes is demonstrated by surface photovoltage and photocurrent measurements. Meanwhile, the photoelectrochemical investigations verify that the ZnFe 2O 4/TiO 2 composite nanotube array modified electrode has a more effective photoconversion capability than the aligned TiO 2 nanotube arrays alone. In addition, the photoelectrocatalytic ability of the novel electrode is found enhanced in the degradation of 4-chlorophenol. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
AB - An electrode with intimate and well-aligned ZnFe 2O 4/TiO 2 composite nanotube arrays is prepared via electrochemical anodization of pure titanium foil in fluorine-containing ethylene glycol, followed by a novel cathodic electrodeposition method. The deposition of ZnFe 2O 4 is promoted in the selfaligned, vertically oriented TiO 2 nanotube arrays but minimized at the tube entrances. Thus, pore clogging is prevented. Environmental scanning electron microscopy, energy-dispersive X-ray spectra, high-resolution transmission electron microscopy, X-ray diffraction patterns, and X-ray photoelectron spectroscopy indicate that the as-prepared samples are highly ordered and vertically aligned TiO 2 nanotube arrays with ZnFe 2O 4 nanoparticles loading. The TiO 2 nanotubes are anatase with the preferential orientation of <101> plane. Enhanced absorption in both UVand visible light regions is observed for the composite nanotube arrays. The current-voltage curve of ZnFe 2O 4-loaded TiO 2 nanotube arrays reveals a rectifying behavior. The enhanced separation of photoinduced electrons and holes is demonstrated by surface photovoltage and photocurrent measurements. Meanwhile, the photoelectrochemical investigations verify that the ZnFe 2O 4/TiO 2 composite nanotube array modified electrode has a more effective photoconversion capability than the aligned TiO 2 nanotube arrays alone. In addition, the photoelectrocatalytic ability of the novel electrode is found enhanced in the degradation of 4-chlorophenol. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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U2 - 10.1002/adfm.200902390
DO - 10.1002/adfm.200902390
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 20
SP - 2165
EP - 2174
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 13
ER -