采用电化学沉积Pt和化学沉积CuS的方法对TiO2纳米管阵列电极进行复合修饰,获得了二元TiO2-Pt 和三元 TiO2-Pt/CuS 纳米结构体系.用SEM和TEM-EDS对催化剂进行了表征,并用水和有机物作为目标物,评价所制备的催化剂的光电活性.结果表明,TiO2在电化学和化学沉积后都能够保持原有形貌；Pt 在纳米管内和阵列表面都有沉积,部分CuS与Pt形成混相复合状态.水的分解和有机物的降解的结果表明,所制备的光电材料的光电活性顺序为TiO2-Pt/CuS＞TiO2-Pt＞TiO2.
The TiO2/Pt and TiO2-Pt/CuS nano-crystalline photocatalystes were prepared by electrochemical deposition of Pt and chemical deposition of CuS on TiO2 nanotube array electrode fabricated using anodic oxida-tion method.Scanning electron microscope (SEM)and transmission electron microscopy (TEM)were used to characterize the morphology of TiO2 ,TiO2-Pt and TiO2-Pt/CuS.Energy dispersive spectrometer (EDS)was used to investigate the elemental structures of photocatalystes.The photocatalytic activities of the prepared samples were investigated by using photocatalytic degradation of H2 O and organic compounds as model reac-tions in solution.The results showed that TiO2 nanotube array can maintain the original morphology under Pt electrochemical deposition and CuS chemical deposition.Pt can deposit in the TiO2 nanotube.Some CuS can form a mixed-phase with Pt on the surface of the TiO2 nanotube array electrode.The results obtained from the hydrolysis and the degradation of organic compounds showed that the order of photocatalytic activities of the prepared samples was TiO2-Pt/CuS>TiO2-Pt>TiO2 .
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