Photoelectrocatalytic properties of Ag nanoparticles loaded TiO2 nanotube arrays prepared by pulse current deposition

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 election 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 in actuation and the photocatalytic activity under visible light irradiation for newly synthesized Ag/TiO2 nanotube arrays were investigated The maximum incident photon to charge culler efficiency (IPCE) value of Ag/TiO2 nanotube arrays was 51%, much higher than that of pm e TiO2 nanotube all ays. Ag/TiO2 nanotube arrays exhibited higher photocatalytic activities than the pine 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 put e TiO2 nanotube allays This approach can be used in synthesizing various metal-loaded nanotube arrays materials (C) 2010 Elsevier Ltd. All lights reserved