α-Fe_2O_3-TiO_2/SA复合半导体薄膜的制备及光催化性能的研究  

Preparation and Photo-catalyst Properties of the α-Fe_2O_3-TiO_2 Films on Sodium Alginate Polymer

作　　者：陈力勤[1] 钟淮真[1] 陈日耀[1] 郑曦[1] 陈震[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《电化学》2004年第4期452-459,共8页Journal of Electrochemistry

基　　金：福建省科技厅重点项目 (0 2H0 3 4)资助

摘　　要：　应用sol gel法制备纳米α Fe2O3、TiO2及α Fe2O3 TiO2粉体,并以其作前驱体制得该纳米微粒与海藻酸钠的复合膜.由红外光谱(FT IR)、X 射线粉末衍射(XRD)、荧光光谱(PL)、透射电子显微镜(TEM)和循环伏安(I V)等物理化学方法表征、测定各复合薄膜的表面结构与催化活性.紫外 可见吸光光度法等研究结果表明,以杀菌紫外灯作光源,在纳米Fe2O3、TiO2及α Fe2O3 TiO2与海藻酸钠的复合膜悬浮液中,亚甲基蓝可被快速脱色降解,若于α Fe2O3中加入15%的TiO2,其α Fe2O3 TiO2复合晶体比单一的α Fe2O3或TiO2具有更高的光降解活性.Three new nano thin films of α-Fe_2O_(3)、TiO_2 and α-Fe_2O_(3)-TiO_2 by doping their powder with sodium alginate polymer were prepared. Surface structure and catalytic activities of the films were characterized by FTIR、XRD、PL、TEM and I-V techniques. The results of UV-visible absorption showed that the methylene blue was mineralized in aqueous of α-Fe_2O_(3)/SA、TiO_2/SA and (α-(Fe_2O_(3)))-TiO_2 /SA upon radiation with ultra violet light. α-Fe_2O_(3) enhanced their photo-decolorized-activities by doping 15% TiO_2.

关 键 词：Α-FE2O3 TiO2 复合半导体 晶体 光催化性能 循环伏安 吸光光度法 制备 复合膜 前驱体 

分 类 号：O643.32[理学—物理化学]