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Indexed by:期刊论文

Date of Publication:2017-12-15

Journal:APPLIED SURFACE SCIENCE

Included Journals:Scopus、SCIE、EI

Volume:425

Page Number:507-517

ISSN No.:0169-4332

Key Words:TiO2 nanotube arrays; MoS2 nanobelts; Photoelectrocatalytic

Abstract:Novel MoS2 sensitized TiO2 nanotube arrays with high photoelectrocatalytic activity under visible light irradiation were successfully synthesized via photo-assisted electrodeposition procedure. The photoelectrocatalytic (PEC) performance of the composite electrode was examined by the photoelectrocatalytic oxidation of methylene blue (MB) and sulfadiazinmu (SD) under a 500 W Xe lamp with a UV light cutoff filter (lambda >= 410 nm). The MoS2/TiO2 heterostructure photoelectrode presented a significantly enhanced PEC activity than the pure TiO2 NTs owing to its stronger light-harvesting ability and improved separation of photogenerated electrons and holes in comparison with TiO2 nanotubes. The obviously reduced electron-hole recombination rates of MoS2/TiO2 were demonstrated from PL spectroscopy measurements and the photoelectrochemical evaluation. The degradation rate of MoS2/TiO2 NTs photoelectrode for PEC degradation of MB and SD was 3 times that of TiO2 NTs photoelectrode. It was found that holes and single oxygen act as the main oxidative species. (C) 2017 Elsevier B.V. All rights reserved.