Gadolinium doped tin dioxide nanoparticles: an efficient visible light active photocatalyst

作     者：Abdullah M Al-Hamdi Mika Sillanp?? Joydeep Dutta 

作者机构：Laboratory of Green Chemistry Lappeenranta University of Technology Chair in Nanotechnology Water Research Center Sultan Qaboos University Functional Materials Division School of Information and Communication Technology KTH Royal Institute of Technology 

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

年 卷 期：2015年第33卷第12期

页      面：1275-1283页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 070301[理学-无机化学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：partial financial support from the Chair in Nanotechnology Programme of the Research Council of Oman 

主　　题：rare earth dopants solar irradiation phenol photo-degradation tin dioxide nanoparticles organic by-products 

摘      要：Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide （SnO2） nanoparticles was reported. Gadolinium doped tin dioxide （SnO2：Gd） nanoparticles were found to absorb higher visible light compared to lanthanum, neodymium and cerium doped materials that were studied in detail. Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2：Gd nanoparticles was studied with high performance liquid chromatography （HPLC）, capillary electrophoresis （CE）, total organic carbon （TOC） measurements and the determination of chemical oxygen demand （COD）. Clear correlations be- tween the results obtained from these multiple measurements were found, and a kinetic pathway for the degradation process was pro- posed. Within 150 min of solar irradiation, the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%, thus demon- strating that SnO2：Gd nanoparticles are efficient visible light photocatalysts.