文献类型：期刊文献

英文题名：Improving the visible light photocatalytic activity of mesoporous TiO 2 via the synergetic effects of B doping and Ag loading

作者：Tian, Baozhu[1]; Shao, Zhimang[1]; Ma, Yunfei[1]; Zhang, Jinlong[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：2011

卷号：72

期号：11

起止页码：1290

外文期刊名：Journal of Physics and Chemistry of Solids

收录：EI(收录号：20113814343079)

语种：英文

外文关键词：Energy gap - X ray photoelectron spectroscopy - Boric acid - Photodegradation - Photocatalysis - Mesoporous materials - Photocatalysts - Silver compounds - High resolution transmission electron microscopy - Light - X ray diffraction

摘要：B-doped together with Ag-loaded mesoporous TiO2 (Ag/BTiO 2) was prepared by a two-step hydrothermal method in the presence of boric acid, triblock copolymer surfactant, and silver nitrate, followed by heat treatment. The obtained samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), UVvis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy (XPS), and nitrogen adsorptiondesorption. It was revealed that all samples consist of highly crystalline anatase with mesoporous structure. For Ag/BTiO2, B was doped into TiO2 matrix in the form of both interstitial B and substitutional B while Ag was deposited on the surface of BTiO2 in the form of metallic silver. Compared with the single B-doped or Ag-loaded TiO2 one, mesoporous Ag/BTiO2 exhibits much higher visible light photocatalytic activity for the degradation of Rhodamine 6G, which can be ascribed to the synergistic effects of B doping and Ag loading by narrowing the band gap of the photocatalyst and preventing the fast recombination of the photogenerated charge carriers, respectively. ? 2011 Elsevier Ltd. All rights reserved.