Fe^3＋掺杂TiO2纳米薄膜及其光催化性能

用溶胶-凝胶法制备了Fe^3＋掺杂纳米TiO2薄膜，研究了不同Fe^3＋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Fe^3＋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．

Study on the Fe3+-doped TiO2 thin film and its photocatalysis

Fe~(3 )doped TiO_2 thin film was prepared by solgel method; the correlation between optical properties, crystal structure and photocatalysis of TiO_2 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 TiO_2, and the thin films with 0.3%~0.4? 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 TiO_2.