Enhanced photoelectrochemical performance of MoS2 nanobelts-loaded TiO2 nanotube arrays by photo-assisted electrodeposition
Enhanced photoelectrochemical performance of MoS2 nanobelts-loaded TiO2 nanotube arrays by photo-assisted electrodeposition
复制标题
光辅助电沉积增强MoS2纳米带负载TiO2纳米管阵列的光电化学性能
DOI：
10.1016/j.apsusc.2017.06.297
复制
发表时间：
2017-12-15
影响因子：
6.7
通讯作者：
Tang, Yubin
中科院分区：
文献类型：
--
作者：
Teng, Wei;Wang, Youmei;Tang, Yubin
采用光辅助电沉积法成功制备了在可见光照射下具有高光电催化活性的MoS2敏化TiO2纳米管阵列。以亚甲基蓝（MB）和磺胺嘧啶（SD）为氧化物，在500 W紫外灯（λ ≥ 410 nm）下考察了复合电极的光电催化性能。MoS2/TiO2异质结构光电极具有比纯TiO2纳米管更强的光捕获能力和更好的光生电子和空穴分离能力，因此具有比纯TiO2纳米管更高的光电转换活性。光致发光光谱和光电化学测试结果表明，MoS2/TiO2的电子-空穴复合率明显降低。MoS2/TiO2 NTs光电极对PEC降解MB和SD的降解速率是TiO2 NTs光电极的3倍。结果表明，空穴和单氧是主要的氧化物种。(C)2017 Elsevier B.V.版权所有。
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.