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Two-Dimensional Copper-Based Coordination Polymer: Synthesis, Structure and Ion Effect on Adsorption of Cr(Ⅵ)
Author NameAffiliationE-mail
LI Shi-Xiong School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China
Wuzhou Resource Recycling Engineering Technology Research Center, Wuzhou University, Wuzhou, Guangxi 543002, China 
lsx1324@163.com 
FENG An-Qi School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China  
HU Yuan School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China  
LIANG Gui-Chun School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China  
LU Li-Fei School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China  
LU Hui-Ping School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543002, China  
Abstract: Coordination polymers usually have the characteristics of large specific surface area and easy control of structure, which can effectively adsorb and remove Cr(Ⅵ) in water. A copper-based coordination polymer:{[Cu(bipy)4 (1, 3-dab)] [Cu(bipy)2(ClO4)2] (ClO4)2· (1, 3-dab)}n (1), was successfully synthesized by the hydrothermal synthesis method using 4,4'-bipyridine (bipy), 1,3-isophthalonitrile (1,3-dab), Cu(ClO4)2·6H2O as raw materials. The structure of 1 was characterized by IR, X-ray single-crystal diffraction, elemental analysis, and X-ray photoelectron spectroscopy. The results show that 1 belongs to the orthorhombic crystal system, P2221 space group, a=1.115 52(5) nm, b=1.116 66(4) nm, c=3.116 84(15) nm, V=3.882 5(3) nm3. The performance study of adsorbing Cr(Ⅵ) showed that the optimal dosage of adsorbent 1 was 0.04 g·L-1. It had good adsorption performance and pH adaptability in a pH range of 1-9. The adsorption performance was the best when pH=5, and the adsorption capacity could achieve 250 mg·g-1. The ion coexistence experiments showed that the greater the ion concentration and the higher the valence, the more obvious their effect on the adsorption of Cr (Ⅵ) by 1, and the inhibition of anion was higher than that of metal cations, followed the order of PO43- > SO42- > CO32- > Cl- > HCO3- > NO3-.
Keywords: coordination polymers  synthesis  structure  Cr(Ⅵ)  adsorption
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LI Shi-Xiong,FENG An-Qi,HU Yuan,LIANG Gui-Chun,LU Li-Fei,LU Hui-Ping.Two-Dimensional Copper-Based Coordination Polymer: Synthesis, Structure and Ion Effect on Adsorption of Cr(Ⅵ)[J].Chinese Journal of Inorganic Chemistry,2022,38(5):941-950.
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Chinese Journal of Inorganic Chemistry