中文摘要：

利用N掺杂和构建异质结结构改善TiO2基光催化剂的可见光催化性能。通过水热反应法在氢氧化锶溶液中将阳极氧化TiO2纳米管阵列转化为SrTiO3/TiO2复合纳米管阵列结构,并随后在NH3中退火对SrTiO3/TiO2进行N掺杂。利用扫描电子显微镜（SEM）、X射线衍射（XRD）仪、紫外可见吸收（UV-vis）和X射线光电子能谱（XPS）分析了样品的形貌、结构、成分、光谱吸收范围和元素组成。样品的可见光催化降解实验表明,N-SrTiO3/TiO2表现出最佳的可见光催化活性。

英文摘要：

Through hydrothermal reaction in Sr（OH）2 solution for a certain time, the TiO2 nanotube arrays（NTAs） made by electrochemical anodization were converted to SrTiO3/TiO2 heterostructure.Then the samples were doped with nitrogen by annealing in NH3 flow.The products were characterized by SEM, XRD, UV-vis and X-ray photoelectron spectroscopy（XPS）.The results show that the photocatalytic activity of N-SrTiO3/TiO2 NTAs under visible light is enhanced by creating heterostructure and nitrogen doping, which exhibits the best visible light photocatalytic property.