催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (11): 1399-1404.DOI: 10.3724/SP.J.1088.2010.00514

• 研究论文 • 上一篇    下一篇

水热沉淀法制备掺铁二氧化钛中空球及其光催化性能

匡继董, 林碧洲, 陈亦琳, 骈雪涛, 张克智, 张鸥   

  1. 华侨大学材料科学与工程学院, 福建厦门 361021
  • 收稿日期:2010-05-14 出版日期:2010-11-12 发布日期:2014-03-28

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

KUANG Jidong, LIN Bizhou*, CHEN Yilin, PIAN Xuetao, ZHANG Kezhi, ZHANG Ou   

  1. College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, Fujian, China
  • Received:2010-05-14 Online:2010-11-12 Published:2014-03-28

PDF

1473

被引次数

35

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 0.5~3.20 ?m, 壳层厚度为 30~60 nm, 比表面积为 150~300 m2/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 80 min 内降解亚甲基蓝超过 75%. 同时还讨论了光催化机制.

关键词: 铁掺杂, 二氧化钛, 水热沉淀法, 光催化, 亚甲基蓝, 降解

Abstract: 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 mm 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.

Key words: iron doping, titania, hydrothermal precipitation, photocatalysis, methylene blue, degradation