A novel visible-light Nd-doped CdTe photocatalyst for degradation of Reactive Red 43:Synthesis,characterization,and photocatalytic properties

作     者：Younes HANIFEHPOUR Nazanin HAMNABARD Bamin KHOMAMI Sang Woo JOO Bong-Ki MIN Jae Hak JUNG 

作者机构：School of Mechanical Engineering Yeungnam University Department of Chemical and Biomolecular EngineeringUniversity of Tennessee Center for Research FacilitiesYeungnam University School of Chemical Engineering Yeungnam University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2016年第34卷第1期

页      面：45-54页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the New&Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning(KETEP) granted financial Resource from the Ministry of Trade Industry&Energy Republic of Korea(2012T100201679) 

主　　题：neodymium cadmium telluride hydrothermal photocatalyst rare earths 

摘      要：Novel high-efficiency visible-light-sensitive Nd-doped CdTe nanoparticles were prepared with various doping concentra- tions of neodymium ion by a facile hydrothermal method. The reaction products were analyzed via X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, photoelectron spectroscopy （XPS）, and UV-Vis diffuse re- flectance spectroscopy techniques. Red shift was seen in the absorption band edge peak in the UV-Vis absorbance specmun with in- creasing Nd content. The XRD and XPS results confirmed that Nd ions successfully replaced Cd atoms and were incorporated into the crystal lattice of CdTe. SEM and TEM images indicated spherical structure and high crystallinity. Even at a very low Nd/CdTe molar ratio of 2 mol.%, Nd doping could greatly enhance the photocatalytic activity of CdTe. The photocatalytic activity of Nd-doped CdTe nanoparticles was evaluated by monitoring the decolorization of RRed 43 in aqueous solution under visible-light irradiation. The color removal efficiency of Nd0.08Cd0.9eYe and pure CdTe were 83.14% and 14.32% after 100 min of treatment, respectively. Among different amounts of the doping agent, 8 tool.% Nd indicated the highest decolorization. The presence of radical scavengers such as CF, CO3-, SO4〉, and huthanol was found to reduce the decolorization efficiency.