Fe^(3+)掺杂TiO_2纳米薄膜及其光催化性能

Study on the Fe^(3+)-doped TiO_2 thin film and its photocatalysis

用溶胶—凝胶法制备了Fe3+掺杂纳米TiO2薄膜,研究了不同Fe3+掺杂浓度的TiO2薄膜材料的光学性能、晶体结构和光催化性及三者之间的关系,并对相关机理进行了探讨.研究表明:铁掺杂量的不同使TiO2材料的光学性能、晶胞参数及光催化性等发生变化,其中以Fe3+掺杂0.3%~0.4%(摩尔分数)时具有最好的光催化性能,此时纳米TiO2薄膜具有锐钛矿结构,可见光透过率大于70%,紫外吸收限为366nm,比未掺杂的红移了6nm.

Fe^3＋- doped TiO2 thin film was prepared by sol - gel method ; the correlation between optical properties, crystal structure and photocatalysis of TiO2 doped with different Fe^3＋ concentration was studied. The principle was also discussed. The results show that variant Fe^3＋ concentration changes optical property, cell parameter and photocatalysis of TiO2, and the thin films with 0.3%-0. 4% Fe have the best photocatalysis, and the films have anatase structure with optical absorption edge of 366 nm, which have red shift of 6 nm compared with pure TiO2.