文献类型：期刊文献

英文题名：Synthesis and characterization of thermally stable Sm,N co-doped TiO2 with highly visible light activity

作者：Ma, Yunfei[1]; Zhang, Jinlong[1,2]; Tian, Baozhu[1]; Chen, Feng[1]; Wang, Lingzhi[1]

机构：[1] Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; [2] School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China

年份：2010

卷号：182

期号：1-3

起止页码：386

外文期刊名：Journal of Hazardous Materials

收录：EI(收录号：20103313159707)

语种：英文

外文关键词：Doping (additives) - Fourier transform infrared spectroscopy - Nitrogen compounds - Oxide minerals - X ray photoelectron spectroscopy - Crystallite size - X ray diffraction - High resolution transmission electron microscopy - Photocatalysis - Irradiation - Light

摘要：Samarium and nitrogen co-doped titania (Sm/N-TiO2) was successfully prepared via coprecipitation method. The resulting materials were characterized by X-ray diffraction (XRD), N2 physical adsorption, UV-vis absorbance spectroscopy, X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared (FTIR) spectra. Experimental results indicated that samarium doping inhibited the growth of crystalline size and the transformation from anatase to rutile phase. The photocatalytic activities of the samples were evaluated for degradation of salicylic acid under visible light irradiation. It was found that the Sm/N-TiO2 samples presented much higher photocatalytic activity than N-TiO2 and pure TiO2 under visible light irradiation. This could be attributed to the appropriate crystallite size, more efficient separation of electrons and holes on Sm/N-TiO2. In our experiments, the optimal dopant amount of samarium was 1.5% for the maximum photocatalytic degradation and the sample calcined at 400°C showed the best reactivity. ? 2010 Elsevier B.V.