Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation
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 o...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/23722 |
| _version_ | 1848751229053698048 |
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| author | Hou, Y. Li, Xin Yong Zou, X. Quan, X. Chen, G. |
| author_facet | Hou, Y. Li, Xin Yong Zou, X. Quan, X. Chen, G. |
| author_sort | Hou, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T07:49:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-23722 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:49:24Z |
| publishDate | 2009 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-237222023-08-02T06:39:07Z Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation Hou, Y. Li, Xin Yong Zou, X. Quan, X. Chen, G. 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. 2009 Journal Article http://hdl.handle.net/20.500.11937/23722 10.1021/es802420u American Chemical Society restricted |
| spellingShingle | Hou, Y. Li, Xin Yong Zou, X. Quan, X. Chen, G. Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title | Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title_full | Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title_fullStr | Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title_full_unstemmed | Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title_short | Photoeletrocatalytic activity of a Cu 2O-loaded self-organized highly oriented TiO 2 nanotube array electrode for 4-chlorophenol degradation |
| title_sort | photoeletrocatalytic activity of a cu 2o-loaded self-organized highly oriented tio 2 nanotube array electrode for 4-chlorophenol degradation |
| url | http://hdl.handle.net/20.500.11937/23722 |