采用溶胶-凝胶法制备铁掺杂纳米TiO2光催化剂。通过XRD、FT-IR、UV-Vis、PL等对Fe-TiO2样品进行表征和分析,并以亚甲基蓝（MB）作为目标降解物,考察经不同热处理温度及不同掺铁量Fe-TiO2样品对MB的降解效果。结果表明所制备的Fe-TiO2样品的晶型为锐钛矿相与金红石相的混晶相,铁掺杂抑制了晶粒的生长和晶型的转变,样品的吸收阈值波长向可见光红移约68nm,提高了TiO2的光催化活性。在普通日光灯下,经500℃热处理、掺铁量与TiO2摩尔比为1∶200条件下制备的催化剂其光催化活性明显高于Degussa P25。
The TiO2 photocatalyst samples doped with iron were prepared by sol-gel method.The samples were analyzed by XRD,FT-IR,UV-Vis,PL,et al.The photocatalytic activity of the samples doped with different Fe content and sintered at different temperature were investigated by measuring the methyl blue（MB）degradation rate under the fluorescent lamp irradiation.The results show that Fe-TiO2 samples are a mixed phase of anatase and rutile and the threshold wavelength is red shift about 68nm.The iron doping inhibits the growth of crystallite size and transformations of crystallite phase from anatase to rutile and the photocatalytic activity is improved.The activity of the sample prepared at 500℃,n（Fe）∶n（TiO2）=1∶200 is the best under fluorescent lamp and is obviously highter than that of Degussa P25.
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