【摘要】 以聚苯乙烯微球作为模板,水溶性过氧化钛配合物作为前驱体一步合成了掺铁TiO2中空微球,并利用XRD,SEM,TEM,XPS,UV-Vis等测试手段对样品进行了表征。结果表明,一步法制备的掺铁TiO2中空微球以锐钛矿相存在且具有良好的中空结构,掺杂少量铁到体系中,改变了其电子结构,使其吸收波长拓展到可见光区。光催化降解亚甲基蓝溶液的结果表明,掺杂0.75%铁的TiO2中空微球表现出更好的光催化性能。对Fe3+影响光催化活性的机理进行了讨论。更多还原

【Abstract】 Fe-doped TiO2 microspheres with hollow interiors were prepared using polystyrene latex particles as the template and peroxo-titanium complex as the precursor. The resulting samples are characterized by XRD, SEM, TEM, XPS and UV-Vis. The results reveal that the Fe-doped TiO2 hollow microspheres show pure anatase phase and have a good hollow structure. When adding a concentration of Fe into the system, the electronic structures changed and obviously enhance the absorption in the visible light region. TiO2 hollow microspheres with 0.75% Fe dosage exhibited the superior photocatalytic activity for the decomposition of methylene blue under visible-light irradiation. The possible photocatalytic mechanism is proposed.更多还原