摘要
通过溶胶-凝胶法和旋涂法成功制备了多种金属离子掺杂的介孔TiO2薄膜材料。小角X射线衍射谱和TEM测试结果表明Zn2+,Fe3+,Y3+掺杂的TiO2薄膜均具有较有序的介孔结构;掺入Zn2+,Fe3+的介孔TiO2薄膜孔径为7～9nm,掺入Y3+离子后介孔孔径扩大至10.9nm。通过透射光谱研究了三种离子掺杂对介孔TiO2薄膜光学性能的影响,并用Swanepoel包络法拟合了薄膜的折射率。结果表明,掺入Fe3+后,介孔TiO2薄膜光吸收带明显展宽,且具有丰富的表面能态;Y3+掺杂能抑制介孔TiO2纳米晶生长,有助于得到较大孔径的介孔TiO2薄膜。
Ion-doped mesoporous TiO2 thin films with regular mesoporous structure ware successfully prepared through the sol-gel method and spin-coating.The Zn^2＋,Fe^3＋-doped TiO2 thin films exhibit mesoporous structure with pore size of 7-9 nm,and the Y^3＋-doped TiO2 thin films exhibit mesoporous structure with larger pore size of 10.9 nm,which characterized by small angle X-ray diffraction patterns and TEM photographs.Optical properties were studied through the thin film transmission spectra of three kind of metal-doped mesoporous TiO2 thin films,and the refractive index of the films were fitted by Swanepoel envelope method.It can be found that after doping with Fe^3＋,optical absorption edge of mesoporous TiO2 thin-films was obviously broadened;and Y^3＋ dopants protects the collapse of mesoporous structure from the excessive growth of TiO2 nanocrystalline,offering a help to obtain mesoporous thin-films with large pore size.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第6期1841-1845,共5页
Acta Optica Sinica
基金
国家大学生创新项目(CZGJ08-12)
上海市教委创新项目(08YZ08)
上海市科委AM基金(08520741600)
上海市重点学科(S30107)资助课题
