Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation
TiO2 nanotube arrays were decorated with Ag/Ag3PO4 nanoparticles through a sequential chemical bath deposition and followed by partial reduction of Ag+ ions in the Ag3PO4 nanoparticles to Ag0 under UV irradiation. The structure and optical properties of the Ag/Ag3PO4/TiO2 nanotube electrode were cha...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/40076 |
| _version_ | 1848755767572692992 |
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| author | Teng, W. Li, Xin Yong Zhao, Q. Chen, G. |
| author_facet | Teng, W. Li, Xin Yong Zhao, Q. Chen, G. |
| author_sort | Teng, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | TiO2 nanotube arrays were decorated with Ag/Ag3PO4 nanoparticles through a sequential chemical bath deposition and followed by partial reduction of Ag+ ions in the Ag3PO4 nanoparticles to Ag0 under UV irradiation. The structure and optical properties of the Ag/Ag3PO4/TiO2 nanotube electrode were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy and electrochemical techniques. The photoelectrocatalytic (PEC) activity of the composite electrode was evaluated by the decomposition of 2-chlorophenol under visible light irradiation (λ > 420 nm). Clusters of Ag/Ag3PO4 nanoparticles were successfully formed on the surface of the TiO2 nanotubes (NTs) causing no damage to the ordered structure of the nanotubes. The PL intensity of Ag/Ag3PO4/TiO2 NTs was much lower than that of TiO2 nanotubes. The p-type Ag3PO4 and Ag nanoparticles deposited on the TiO2 NTs could promote the transfer of photo-generated electrons, which inhibited the recombination of electrons and holes effectively, leading to a significant increase in the photocurrent density. Moreover, the Ag/Ag3PO4/TiO2 heterostructure photoelectrodes showed much higher PEC activity than the pure TiO2 NTs for the degradation of 2-CP aqueous solution under visible light irradiation. The enhanced PEC activity could be attributed to the visible-light photocatalytic activity of Ag3PO4 and the heterostructure between Ag3PO4 and TiO2. The electron spin resonance (ESR) spin-trap study further demonstrated that ˙OH could be generated on the Ag/Ag3PO4/TiO2 NTs under visible light irradiation. |
| first_indexed | 2025-11-14T09:01:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-40076 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:32Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-400762017-09-13T15:07:14Z Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation Teng, W. Li, Xin Yong Zhao, Q. Chen, G. TiO2 nanotube arrays were decorated with Ag/Ag3PO4 nanoparticles through a sequential chemical bath deposition and followed by partial reduction of Ag+ ions in the Ag3PO4 nanoparticles to Ag0 under UV irradiation. The structure and optical properties of the Ag/Ag3PO4/TiO2 nanotube electrode were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy and electrochemical techniques. The photoelectrocatalytic (PEC) activity of the composite electrode was evaluated by the decomposition of 2-chlorophenol under visible light irradiation (λ > 420 nm). Clusters of Ag/Ag3PO4 nanoparticles were successfully formed on the surface of the TiO2 nanotubes (NTs) causing no damage to the ordered structure of the nanotubes. The PL intensity of Ag/Ag3PO4/TiO2 NTs was much lower than that of TiO2 nanotubes. The p-type Ag3PO4 and Ag nanoparticles deposited on the TiO2 NTs could promote the transfer of photo-generated electrons, which inhibited the recombination of electrons and holes effectively, leading to a significant increase in the photocurrent density. Moreover, the Ag/Ag3PO4/TiO2 heterostructure photoelectrodes showed much higher PEC activity than the pure TiO2 NTs for the degradation of 2-CP aqueous solution under visible light irradiation. The enhanced PEC activity could be attributed to the visible-light photocatalytic activity of Ag3PO4 and the heterostructure between Ag3PO4 and TiO2. The electron spin resonance (ESR) spin-trap study further demonstrated that ˙OH could be generated on the Ag/Ag3PO4/TiO2 NTs under visible light irradiation. 2013 Journal Article http://hdl.handle.net/20.500.11937/40076 10.1039/c3ta11254c restricted |
| spellingShingle | Teng, W. Li, Xin Yong Zhao, Q. Chen, G. Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title | Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title_full | Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title_fullStr | Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title_full_unstemmed | Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title_short | Fabrication of Ag/Ag3PO4/TiO2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| title_sort | fabrication of ag/ag3po4/tio2 heterostructure photoelectrodes for efficient decomposition of 2-chlorophenol under visible light irradiation |
| url | http://hdl.handle.net/20.500.11937/40076 |