Novel lanthanide coordination polymers based on mixed N,O-donor ligands and their visible-light-driven photocatalytic performance  

作　　者：Jun Chen Weizhi Kou Shunsheng He Chenlan Lin Xin Wang Lianshe Fu Ting-Hai Yang 

机构地区：[1]Jiangsu Laboratory of Precious Metals Processing Technology and Application,School of Chemistry&Environmental Engineering,Jiangsu University of Technology,Changzhou 213001,China [2]Department of Physics,CICECO-Aveiro Institute of Materials,University of Aveiro,3810-193,Aveiro,Portugal

出　　处：《Journal of Rare Earths》2023年第1期85-90,共6页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (51872140,51973173);the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (2021114630082);postgraduate Research&Practice Innovation Program of Jiangsu Province (SJCX20_1027 and SJCX21_1328);the NSF for Universities in Jiangsu Province (18KJB150013)。

摘　　要：In the present work,we prepared three isostructural lanthanide(Ln) coordination polymers(CPs).namely [Ln(Hhpc)(phen)(NO_(3))](Ln=Gd(1),La(2),Y(3),H_(3)hpc=5-hydroxy-1 H-pyrazole-3-carboxyIic acid,phen=1,10-phenanthroline) by hydrothermal method.Their structures were characterized by single crystal X-ray diffraction,Fourier transform infrared spectrum,elemental analysis,powder X-ray diffraction and thermal gravimetric analysis.CPs 1-3 are isostrutural and exhibit two-dimensional(2 D)wavy layered structure constructed from inorganic chains,in which equivalent eight coordinated Ln^(3+) ions are linked through carboxylate groups.The three dimensional supramolecular structure is further formed by hydrogen bonding.The photocatalytic experiments show that CPs 2 and 3 exhibit good photocatalytic performances under visible light in degradation of methylene blue organic dye.The photocatalytic degradation efficiencies in 90 min are about 86.19% and 93.60% for CPs 2 and 3,respectively.The photocatalytic degradation mechanisms have been proposed through photoelectrochemical and trapping radical experiments.

关 键 词：LANTHANIDES Coordination polymers Photocatalytic degradation Pyrazole carboxylic acid Rare earths 

分 类 号：O643.36[理学—物理化学]