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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >CdSe modified TiO2 nanotube arrays with Ag nanoparticles as electron transfer channel and plasmonic photosensitizer for enhanced photoelectrochemical water splitting
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CdSe modified TiO2 nanotube arrays with Ag nanoparticles as electron transfer channel and plasmonic photosensitizer for enhanced photoelectrochemical water splitting

机译：CDSE用Ag纳米颗粒改性TiO2纳米管阵列作为电子传输通道和等离子体光敏剂，用于增强的光电化学水分子

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摘要

Ag nanoparticles (NPs) and a CdSe nanocrystal were successively deposited on the surface of a TiO2 nanotube array film (CdSe/Ag/TiO2 NTs) via microwave assisted chemical reduction and in situ fabrication methods. The nanotubular structure of TiO2 preserves well after loading Ag and CdSe, as the ternary composite not only exhibits an excellent visible light harvesting ability but also has the smallest charge transfer resistance according to electrochemical impedance measurement. The most positive flat band potential of CdSe/Ag/TiO2 NTs facilitates charge carrier transfer at the semiconductor-electrolyte interface. Notably, the introduction of Ag nanoparticles forms a unique carrier-transfer-channel in the CdSe/Ag/TiO2 NTs system, in which the Ag nanoparticles can take advantage of its high carriers transfer rate as a linker. In addition, Ag serving as a surface plasmon resonance source further improves photoelectric catalytic activities of the sample. It is noteworthy that CdSe/Ag/TiO2 NTs exhibits the desired photoelectrochemical performance with the highest H-2 production rate of 413.99 mu mol cm(-2) after 2.5 h irradiation.
机译：通过微波辅助化学还原和原位制造方法依次沉积在TiO2纳米管阵列膜（Cdse / Ag / TiO 2 NTS）的表面上沉积Ag纳米颗粒（NPS）和CDSE纳米晶体。加载Ag和CdSe后，TiO2的纳米管结构良好，因为三元复合材料不仅表现出优异的可见光收获能力，而且根据电化学阻抗测量也具有最小的电荷传递电阻。 CDSE / AG / TiO2 NT的最正扁平带电位有利于半导体电解质界面处的电荷载波转移。值得注意的是，Ag纳米颗粒的引入在CDSE / Ag / TiO 2 NTS系统中形成独特的载体转移通道，其中Ag纳米颗粒可以利用其高载体转移率作为接头。另外，作为表面等离子体共振源的AG进一步改善了样品的光电催化活性。值得注意的是，Cdse / Ag / TiO2 NTS在2.5小时照射后，Cdse / Ag / TiO2 NTS表现出所需的光电化学性能，最高的H-2生产速率为413.99μmmolcm（-2）。

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