文献类型：期刊文献

英文题名：Synthesis of well ordered mesoporous Yb, N co-doped TiO2 with superior visible photocatalytic activity

作者：Ma, Yunfei[1]; Xing, Mingyang[1]; Zhang, Jinlong[1]; Tian, Baozhu[1]; Chen, Feng[1]

机构：[1] Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2012

卷号：156

起止页码：145

外文期刊名：Microporous and Mesoporous Materials

收录：EI(收录号：20121614946158)

语种：英文

外文关键词：Self assembly - X ray photoelectron spectroscopy - Titanium dioxide - Calcination - Doping (additives) - Light - Mesoporous materials - Photocatalysis - Transmission electron microscopy - X ray diffraction - Rhodium compounds

摘要：Well-ordered mesoporous TiO2 co-doped with nitrogen and ytterbium was successfully synthesized by an evaporation-induced self-assembly process. The as-prepared and calcined mesoporous TiO2 materials were characterized by X-ray diffraction, transmission electron microscope, UV-vis absorbance spectroscopy, X-ray photoelectron spectroscopy, fourier transform infrared and N2 adsorption-desorption measurements. After calcinations at 350 °C, the TiO2 co-doped with nitrogen and 3% ytterbium had the highest surface area (219 m2 g-1) and retained ordered structures. Under visible light irradiation, 75% of 20 mg/L phenol solution was degraded after 10 h and 10 mg/L rhodamine B (RhB) was decomposed completely after 4 h. The significant enhancement in the photocatalytic activity of the modified TiO2 is attributed to the synergistic effect of N and Yb. The N dopant extended the absorption to visible region and the Yb dopant was beneficial in stabilizing the mesoporous structure and restraining the recombination of photogenerated holes and electrons. ? 2012 Elsevier Inc. All rights reserved.