Photoelectrocatalytic properties of Ag nanoparticles loaded TiO2 nanotube arrays prepared by pulse current deposition |
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| Authors: | Kunpeng Xie Chenglin Wang Mengye Wang Changjian Lin |
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| Affiliation: | a Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Siming South Road, No. 422, Xiamen 361005, PR China
b State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, PR China |
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| Abstract: | A pulse current deposition technique was adopted to construct highly dispersed Ag nanoparticles on TiO2 nanotube arrays which were prepared by the electrochemical anodization. The morphology, crystallinity, elemental composition, and UV-vis absorption of Ag/TiO2 nanotube arrays were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and diffuse reflectance spectra (DRS). In particular, the photoelectrochemical properties and photoelectrocatalytic activity under UV light irradiation and the photocatalytic activity under visible light irradiation for newly synthesized Ag/TiO2 nanotube arrays were investigated. The maximum incident photon to charge carrier efficiency (IPCE) value of Ag/TiO2 nanotube arrays was 51%, much higher than that of pure TiO2 nanotube arrays. Ag/TiO2 nanotube arrays exhibited higher photocatalytic activities than the pure TiO2 nanotube arrays under both UV and visible light irradiation. The photoelectrocatalytic activity of Ag/TiO2 nanotube arrays under UV light irradiation was 1.6-fold enhancement compared with pure TiO2 nanotube arrays. This approach can be used in synthesizing various metal-loaded nanotube arrays materials. |
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| Keywords: | Ag nanoparticles Electrodeposition TiO2 nanotube arrays Photoelectrochemical performance Photoelectrocatalysis |
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