水热沉淀法制备掺铁二氧化钛中空球及其光催化性能  

Photocatalytic Activity of Fe-Doped Titania Hollow Spheres Prepared by Hydrothermal Precipitation

作　　者：匡继董[1] 林碧洲[1] 陈亦琳[1] 骈雪涛[1] 张克智[1] 张鸥[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《催化学报》2010年第11期1399-1404,共6页

基　　金：国家自然科学基金(50872037);福建省自然科学基金(2010J01040)

摘　　要：以碳球为模板剂,采用水热沉淀法制备了不同配比掺Fe的TiO2(Fe-TiO2)中空球,并运用X射线粉末衍射、扫描电子显微镜、元素分析能谱、红外光谱和热重等方法对其进行了表征.结果表明,中空球为锐钛矿相,大小为0.5～3.20μm,壳层厚度为30～60nm,比表面积为150～300m2/g.随着Fe掺杂量的增加,中空球在可见光区的吸收强度逐渐增加.光催化降解实验表明,掺Fe后,TiO2中空球的可见光催化活性升高,其中0.5%Fe-TiO2在80min内降解亚甲基蓝超过75%.同时还讨论了光催化机制.Fe-doped titania hollow spheres（Fe-TiO2） with different dopant contents have been prepared by a hydrothermal precipitation method with carbon spheres as the template.The phase structure,morphology,composition,and crystalline grain size were characterized by X-ray powder diffraction,scanning electron microscopy,infrared spectroscopy,thermogravimetry/differential scanning calorimetry.The as-prepared hollow spheres were anatase with 0.5–3.20 μm in diameter,30–60 nm in thickness,and 150–300 m2/g in specific surface area.With increasing dopant content,Fe-TiO2 exhibited an intense absorption in the visible light region.Fe-TiO2 exhibited photocatalytic activity for the degradation of methylene blue under visible light irradiation,and the degradation rate of methylene blue over 0.5% Fe-TiO2 hollow spheres was about 75% in 80 min.The catalytic reaction mechanism was discussed.

关 键 词：铁掺杂 二氧化钛 水热沉淀法 光催化 亚甲基蓝 降解 

分 类 号：O643.36[理学—物理化学]