中文摘要：

以TiO2和NaOH为原料，采用水热法制备了TiO2纳米管（titania nanotube，简称TNT），通过X射线衍射（XRD）、高分辨透射电镜（HRTEM）、BET比表面积测定等手段对其结构和性质进行了表征。以亚甲基蓝（methylene blue，简称MB）为模型反应物，考察了TiO2纳米管光催化降解MB的效果。研究结果表明，TiO2纳米管是在酸交换后形成的，400℃焙烧时，TiO2纳米管中出现锐钛矿相；制备的TiO2纳米管可有效地降解MB，TiO2纳米管光催化降解MB的效率与其锐钛矿相的含量有关。

英文摘要：

In this study,titania nanotube （TNT） was prepared via a hydrothermal method taking TiO2 and NaOH as raw material and XRD, HRTEM and BET special surface area were used to characterized the structure and morphology of TNTs. Methylene Blue （MB） aqueous solution was selected as a probe to evaluated the photoc atalytic activities of TNTs. The results showed that nanotube was formed after acid washing and anatase phase was obtained in TNT by calcinating the sample at 400℃. TNT can decompose the MB aqueous solution effectively,and the efficiency of photo-degradation was related to the anatase content in TNTs.