中文摘要：

采用自组装方法于低温液相反应体系中成功制备出大尺寸二维纳米二氧化钛薄膜和掺铁二氧化钛薄膜。样品通过荧光发射光谱、拉曼光谱、高分辨透射电镜等方法进行表征,并研究了紫外光和可见光下Fe^3＋/TiO2纳米薄膜对甲基橙溶液（MO）的光催化降解过程,探讨了Fe^3＋对TiO2的光催化活性的影响。结果表明,此方法不需要高温煅烧即可得到高催化活性的金红石和锐钛矿混合型二氧化钛薄膜,以金红石为主。Fe^3＋掺杂明显提高了TiO2对甲基橙溶液的光催化降解效率：掺杂Fe^3＋浓度为0.5 mmol/L时光催化效果最优,且更利于较低浓度甲基橙溶液的降解,在紫外光和可见光下对初始浓度5 mg/L甲基橙溶液的降解率分别达到98.62%和89.24%。

英文摘要：

Large-size two-dimensional nano-TiO2 and iron-doped nano-TiO2 thin films were prepared in low-temperature aqueous system by using molecular self-assembly method.Samples were characterized with fluorescence emission spectra,Raman testing techniques and TEM.The photocatalytic activity was evaluated with the degradation of methyl orange solution under UV and visible light radiation,and discussed based on the influence of iron on the photocatalytic activity of TiO2.This method could prepare anatase-rutile mixing thin films without high-temperature calcination and the doped iron could obviously improve photocatalytic activity of TiO2.When the amount of iron decreased to 0.5 mmol/L,the photocatalytic activity reached the maximum,and it was in favor of degradation of low concentrations of methyl orange with.The degradation data of methyl orange（with 5 mg/L initial concentration） were respectively 98.62% and 89.24% under illumination by using ultraviolet lamp and visible light.