Fabrication of La,Ce co-doped ZnO nanorods for improving photodegradation of methylene blue  

作　　者：Erfan Hakim Azmal Zaid Jin-Chung Sin Sze-Mun Lam Abdul Rahman Mohamed 

机构地区：[1]School of Chemical Engineering,Universiti Sains Malaysia(USM),14300,Nibong Tebal,Penang,Malaysia [2]College of Environmental Science and Engineering,Guilin University of Technology,Guilin,541004,China [3]Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control,Guilin University of Technology,Guilin,541004,China [4]Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin,541004,China [5]Faculty of Engineering and Green Technology,Universiti Tunku Abdul Rahman,Jalan Universiti,Bandar Barat,31900,Kampar,Perak,Malaysia

出　　处：《Journal of Rare Earths》2024年第1期76-83,I0003,共9页稀土学报（英文版）

摘　　要：La,Ce co-doped ZnO nanorods(ZnLC)were synthesized through a one-step solvothermal route.The photocatalysts were characterized by X-ray diffraction,Raman spectroscopy,field-emission scanning electron microscopy,energy dispersive X-ray,transmission electron microscopy,UV-vis diffuse reflectance spectroscopy and photo luminescence spectroscopy.The La and Ce doping enhanced the visible light absorption ability of ZnLC and a red shift was detected for ZnLC.Under simulated solar light irradiation,the ZnO doped with 3 at%La and 1 at%Ce(ZnLC1)degrades methylene blue(MB)more effectively than those of pure ZnO,La-doped ZnO(ZnL)and commercially available ZnO.The improved photocatalytic performance of ZnLC1 can be attributed to the high charge separation efficiency as demonstrated by the photoluminescence spectra.Additionally,the photocatalytic experiments reveal that several parameters have their own impact on the MB degradation.Using a variety of radical scavengers,it is discovered that superoxide anion radical plays a crucial role in the degradation of MB.The ZnLC1 is also reused several times without noticeable decrease of photoactivity,indicating that it has a substantial potential for environmental remediation applications.

关 键 词：ZnO LANTHANUM CERIUM CO-DOPING PHOTODEGRADATION Rare earths 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] TB383.1[理学—化学]