TY - JOUR
T1 - Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation
AU - Hou, Yang
AU - Li, Xinyong
AU - Zou, Xuejun
AU - Quan, Xie
AU - Chen, Guohua
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 - 2009/2/1
Y1 - 2009/2/1
N2 - Differently sized Cu 2O nanoparticles have been assembled photocatalytically on the surface of self-organized highly oriented TiO 2 nanotubes obtained by anodization of a Ti sheet in fluoride- containing electrolytes. X-ray diffraction analysis identifies an anatase structure and fine preferential orientation of (101) planes. The UV-vis absorption edge of the TiO 2 nanotube arrays shift to lower energy after Cu 2O loading. The composite array electrode exhibits a higher photovoltage response than the TiO 2 powders directly deposited on a Ti sheet. The highest photoconversion efficiencies observed for the Cu 2O-loaded electrode are 17.2% and 0.82% under UV light and visible light irradiation, respectively. Especially, the composite array electrode shows a higher efficiency than the nonloaded one for the photoelectrocatalytic decomposition of 4-chlorophenol. The improved photoeletrocatalytic activity of the TiO 2/Cu 2O composite array electrode is attributed to the synergistic effect of Cu 2O nanoparticles and TiO 2 nanotube arrays. The Cu 2O nanoparticles could enhance the efficiency of photon harvesting and reduce the chances of electron-hole recombination by sending the electrons to the conduction band of TiO 2 nanotubes. The accumulated electrons in the conduction band of TiO 2 nanotubes would reduce oxygen to form peroxides for enhanced advanced oxidation. The byproducts were identified by high- performance liquid chromatography. © 2009 American Chemical Society.
AB - Differently sized Cu 2O nanoparticles have been assembled photocatalytically on the surface of self-organized highly oriented TiO 2 nanotubes obtained by anodization of a Ti sheet in fluoride- containing electrolytes. X-ray diffraction analysis identifies an anatase structure and fine preferential orientation of (101) planes. The UV-vis absorption edge of the TiO 2 nanotube arrays shift to lower energy after Cu 2O loading. The composite array electrode exhibits a higher photovoltage response than the TiO 2 powders directly deposited on a Ti sheet. The highest photoconversion efficiencies observed for the Cu 2O-loaded electrode are 17.2% and 0.82% under UV light and visible light irradiation, respectively. Especially, the composite array electrode shows a higher efficiency than the nonloaded one for the photoelectrocatalytic decomposition of 4-chlorophenol. The improved photoeletrocatalytic activity of the TiO 2/Cu 2O composite array electrode is attributed to the synergistic effect of Cu 2O nanoparticles and TiO 2 nanotube arrays. The Cu 2O nanoparticles could enhance the efficiency of photon harvesting and reduce the chances of electron-hole recombination by sending the electrons to the conduction band of TiO 2 nanotubes. The accumulated electrons in the conduction band of TiO 2 nanotubes would reduce oxygen to form peroxides for enhanced advanced oxidation. The byproducts were identified by high- performance liquid chromatography. © 2009 American Chemical Society.
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U2 - 10.1021/es802420u
DO - 10.1021/es802420u
M3 - RGC 21 - Publication in refereed journal
C2 - 19245027
SN - 0013-936X
VL - 43
SP - 858
EP - 863
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 3
ER -