中文摘要：

首先通过阳极氧化法制备TiO2纳米管阵列薄膜,以TiO2纳米管为初始反应物和模板,在Sr（OH）2溶液中水热反应,然后热处理,合成了异质结TiO2/SrTiO3 纳米管阵列.采用X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、场发射透射电子显微镜（FE-TEM）、X 射线光电子能谱（XPS）和激光拉曼（Raman）光谱测试手段对样品进行表征.最后通过紫外光照下亚甲基蓝（MB）的降解速率,评估异质结TiO2/SrTiO3光电催化活性.结果表明：部分TiO2发生原位取代在高度有序的纳米管表面形成了SrTiO3,并促使TiO2 锐钛矿（004）晶面的取向生长;与纯TiO2 纳米管相比,该异质结TiO2/SrTiO3活性提高非常明显,特别是阳极氧化2 h异质结TiO2/SrTiO3,光电催化15 min,MB降解率高达99.66%.此外,讨论了异质结纳米管长度对光电性能的影响.本文所提出的合成异质结TiO2/SrTiO3 纳米管阵列的方法,为异质结TiO2/ATiO3（A=Ca、Ba等）复合材料的合成提供了基础.

英文摘要：

Firstly, TiO2 nanotube arrays films were prepared by anodization,subsequently,heterostructure TiO2/SrTiO3 nanotube arrays were fabricated in Sr(OH)2 hydrothermal solution using TiO2 nanotubes as both an initial re-actant and a “structure-template” and then undergoing calcination. The heterostructure TiO2/SrTiO3 nanotube arrays were characterized via X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM), field emis-sion transmission electron microscopy(FE-TEM), X-ray photoelectron spectroscopy(XPS) and Raman spectros-copy. The photoelectrocatalytic activity of the heterostructure TiO2/SrTiO3 was investigated by measuring the degrada-tion rate of methylblue(MB) under ultraviolet light. Results show that some TiO2 has gone through in situ replace-ment and been converted into SrTiO3 on the surface of the highly ordered nanotubes, promoting the growth of anatase TiO2(004) facets. Compared with the pure TiO2 nanotubes, the heterostructure TiO2/SrTiO3 exhibits excellent photo-electrocatalytic activity. The optimal activity is displayed by the heterostructure TiO2/SrTiO3 anodized for 2 h(MB degradation efficiency for 99.66%). In addition, the impact of the length of heterostructure on photoelectrocatalytic activity has been discussed. The proposed method for the synthesis of the heterostructure TiO2/SrTiO3 nanotube arrays provides the basis for the synthesis of the heterostructure TiO2/ATiO3(A= Ca, Ba, etc) composite materials.