标题：Microstructures and photocatalytic properties of Ag and La~3 surface codoped TiO_2 films prepared by solgel method
作者：Zhao, N.;Yao, M.-M.;Li, F.;Lou, F.-P.
作者机构：[Zhao, N] Key Laboratory of Chemical Sensing and Analysis, Universities of Shandong, University of Jinan, Jinan 250022, China;[ Yao, M.-M] Key Laborat 更多
通讯作者地址：[Yao, MM]Univ Jinan, Sch Chem & Chem Engn, Shandong Univ, Key Lab Chem Sensing & Anal, Jinan 250022, Peoples R China.
来源：Journal of Solid State Chemistry
关键词：Ag/La3 codoping;Photocatalytic activity;Solgel;Surface doping;TiO2 film
摘要：Ag and La~3 surface codoped TiO_2 films were successfully prepared by the improved solgel and doping processes. The as-prepared specimens were characterized using differential thermal analysis-thermogravimetry (DTATG), X-ray diffraction (XRD), high-resolution field emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), BrunauerEmmettTeller (BET) surface area, Photoluminescence spectrum (PL) and UVvis diffuse reflectance spectroscopy. The photocatalytic activities of the films were evaluated by degradation of an organic dye in aqueous solution. The results of XRD, FE-SEM and BET analyses indicated that the TiO_2 films were composed of nano-particles or aggregates with a size of less than 10 nm. With the codoping of Ag and La~3, TiO_2 films with high photocatalytic activity and clearly responsive to the visible light were obtained. The improvement mechanism by ions doping was also discussed.