Photocatalytic activity enhancing for TiO2 photocatalyst by doping with La

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. B02; pp. 728 - 731
• Main Author: 文晨 邓桦 田俊莹 张继梅
• Format: Journal Article
• Language: English
• Published: 01.06.2006
• Subjects: 二氧化钛光催化剂; 光催化活性; 镧掺杂
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(06)60289-6

La doped nanocrystalline TiO2 photocatalyst was developed by sol-gel method. The prepared La-TiO2 photocatalysts with anatase phases were characterized by X-ray diffractometry （XRD）, UV-Vis absorption spectroscopy, and photoluminescence spectra （PL）. The photocatalytic activity was evaluated by the photocatalytic degradation of phenol in solution under sunlight irradiation. The results show that the crystallinity of anatase is improved by La doping. Moreover, La not only suppresses phase transition from anatase to rutile but also exhibits an absorption in the λ≥400 nm range. The photocatalytic activity of La-doped TiO2 photocatalysts exceeds that of pure TiO2 photocatalyst prepared by the same method when the molar ratio of La to Ti is kept at 0.3%.