abstract
In the present work, we prepared three isostructural lanthanide (Ln) coordination polymers (CPs), namely [Ln (Hhpc) (phen) (NO3)] (Ln = Gd (1), La (2), Y (3), H(3)hpc = 5-hydroxy-1H-pyrazole-3-carboxylic 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 (2D) 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. (c) 2022 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
keywords
METAL-ORGANIC FRAMEWORKS; CRYSTAL-STRUCTURES; DEGRADATION; DYE
subject category
Chemistry
authors
Chen, J; Kou, WZ; He, SS; Lin, CL; Wang, X; Fu, LS; Yang, TH
our authors
Lianshe Fu
Assistant Researcher
Tinghai Yang
Post-doc FellowshipProjects
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
acknowledgements
Project supported by the National Natural Science Foundation of China (51872140, 51973173), the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (2021114630 082), postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX20_1027 and SJCX21_1328), the NSF for Universities in Jiangsu Province (18KJB150013).