Fe^(3+)掺杂TiO_2的制备、表征与光催化性能研究

Synthesis,characterization and photocatalytic activity of Fe-doped TiO_2

以空心玻璃微球(GMBs)为载体,钛酸四丁酯(Ti(OC4H9)4)为原料,采用浸涂法制备可漂浮附载型复合光催化剂Fe-TiO2/GMBs。样品的结构、成分、形貌和核壳厚度分别用X射线衍射仪(XRD)、X射线能谱仪(EDS)和场发射扫描电子显微镜(FESEM)进行表征。并研究样品在紫外光照射下催化降解罗丹明B(RhB)的性质。结果表明,Fe元素的存在既没有影响TiO2由锐钛矿相向金红石相转变,也没有增加新的晶相,而是使TiO2的光催化活性明显增强,本文对TiO2光催化机理也进行讨论。

Fe-doped TiO2 photocatalyst supported on hollow glass microbeads（Fe-TiO2/beads） is prepared by dip-coating method,which uses hollow glass microbeads as the carriers and tetrabutylorthotitanate [Ti（OC4H9）4] as the raw material.The phase structure,ingredient,morphologies,particle size and shell thickness of the products are characterized by X-ray powder diffraction（XRD）,energy-dispersive spectroscopy（EDS） and field emission scanning electron microscope（FESEM）.The feasibility of photocatylic degradation of Rhodamine B（RhB） under illumination of UV-vis light is studied.The results show that the catalytic activity of the TiO2 is markedly enhanced by doping Fe ion.The presence of ferrum elements neither influences the transformation of anatase to rutile,nor creates new crystal phases.The possible mechanism of photocatalytic oxidation is also discussed.