Fe^(3+)/Zn^(2+)复合掺杂纳米TiO_2的结构及光催化性能  

CONFIGURATION AND PHOTOCATALYSTIC CAPACITY OF Fe^(3+)/Zn^(2+) CODOPING NANOSTRUCTURED TiO_2 MATERIALS

作　　者：汪冬梅[1] 吴玉程[1] 吕珺[1] 徐光青[1] 左开慧[1] 刘君武[1] 王建明[1] 汤文明[1] 郑治祥[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《硅酸盐学报》2008年第11期1526-1532,1541,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(20571022);安徽省十五科技攻关(01402007);教育部博士点基金(20060359011)资助项目

摘　　要：采用溶胶-凝胶工艺,以钛酸丁酯(Ti(C4H9O)4)为前驱体,冰醋酸为螯合剂,制备了Fe3+/Zn2+复合掺杂的改性纳米TiO2粉体材料。运用X射线衍射、透射电镜、X射线光电子能谱、Fourier变换红外光谱和光吸收研究了铁锌元素掺杂对纳米TiO2相变和光催化活性的影响。结果表明:铁及锌的掺杂会降低TiO2由锐钛矿相向金红石相的转变温度;掺铁和锌能提高纳米TiO2的光催化活性;当Fe3+/Ti4+摩尔比为0.2,Fe3+/Zn2+摩尔比为0.5时,经300℃焙烧1h制备的Fe3+/Zn2+复合掺杂纳米TiO2样品的光催化活性最好;在太阳光照4h时,Fe3+/Zn2+摩尔比为0.5复合掺杂纳米TiO2样品对甲基橙的降解率可达71.43%。Fe3＋/Zn2＋ co-doped nanocrystalline TiO2 powder materials were prepared by the sol-gel process using glacial acetic acid as chelating agent and Ti（CaH9O）4 as precursor. The effects of iron and zinc doping on the phase structure of the nanocrystalline TiO2 and their photocatalytic capacity were investigated by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and optical adsorption. The results show that iron and zinc doping can lower the transformation temperature of anatase to rutile. Fe3＋/Zn2＋ introduced into the nanocrystalline TiO2 can improve the photocatalytic capacity. The TiO2powder doped with Fe3＋/Ti4＋ having a mole ratio of 0.2 and Fe3＋/Zn2＋ having a mole ratio of 0.5 and calcined at 300℃ for 1 h, has the best photocatalytic capacity, and its degradation rate to methyl orange reaches 71.43% under irradiation from the sun＇s rays for 4 h.

关 键 词：溶胶-凝胶法 铁锌复合掺杂 纳米金红石 光催化 

分 类 号：TB383[一般工业技术—材料科学与工程] TB34