用模板法制备TiO_2纳米线阵列膜及光催化性能的研究

Template Synthesis and Photocatalytic Activity of TiO_2 Nanowires Array Film

用溶胶 -凝胶技术在多孔阳极氧化铝模板的有序微孔内制备了高度取向的 Ti O2 纳米线阵列膜光催化剂 .用 XRD,AFM和 SEM等手段对样品进行了表征 .结果表明 ,Ti O2 纳米线阵列膜晶型为锐钛矿 ,从AFM图像中可以看出 Ti O2 纳米线线径分布均匀一致 ,取向性极好 ,直径与 AAO模板的孔径大小一致 .以其对吖啶橙的降解效果作为评价光催化活性的标准 ,与相同条件下制备的 Ti O2 /玻璃膜相比 ,Ti O2 纳米线阵列膜具有很好的催化活性 .

TiO 2 nanowires array film was prepared within the pores of anodic aluminum oxide(AAO) template by using sol-gel chemistry. This method was suitable for solving the problems caused by the generally used sol-gel method, i.e. the agglomeration between particulates of the catalyst film in the burning process and the catalyst from the supports in the reaction. Anatase crystal form of TiO 2 nanowires film was shown through XRD characterization and the diameter was determined by the pore size of the AAO template by using AFM image, respectively. The photocatalytic activity of TiO 2 nanowires array film measured by using an acridine dye solution as a model is higher, compared with that of TiO 2/glass film.