Gd–La codoped TiO2 nanoparticles as solar photocatalysts

作     者：Meng Wang Xiaoyu Xu Lin Lin Dannong He 

作者机构：School of Materials Science and Engineering Shanghai Jiao Tong University National Engineering Research Center for Nanotechnology 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2015年第25卷第1期

页      面：6-11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 Shanghai Municipal Natural Science Foundation (No. 13ZR1429300) the Basic Research Program of Shanghai Science and Technology Committee (No. 13NM1401600) the Shanghai Committee of Science and Technology (No. 12nm0504800) 

主　　题：Photocatalyst Titaninm dioxide Semiconductor Photodegradation Nanotechnology 

摘      要：Gd–La codoped Ti O2 nanoparticles with diameter of 10 nm were successfully synthesized via a sol–gel method. The photocatalytic activity of the Gd–La codoped Ti O2 nanoparticles evaluated by photodegrading methyl orange was significantly enhanced compared to that of undoped or Gd or La mono-doped Ti O2. Ti4+tmay substitute for La3+tand Gd3+tin the lattices of rare earth oxides to create abundant oxygen vacancies and surface defects for electron trapping and dye adsorption, accelerating the separation of photogenerated electron–hole pairs and methyl orange photodegradation. It is believed that the formation of an excitation energy level below the conduction band of Ti O2 from the binding of electrons and oxygen vacancies decreases the excitation energy of Gd–La codoped Ti O2, resulting in versatile solar photocatalysts. The results suggest that Gd–La codoped Ti O2 nanoparticles are promising for future solar photocatalysts.