Two novel porous metal–organic frameworks (MOFs) Cu(TCPBDA) and Cd(TCPBDA) based on a new ligand, namely N,N,N′,N′-tetrakis(4-carboxyphenyl)biphenyl-4,4′-diamine (H4TCPBDA), were synthesized by solvent thermal method and characterized with scanning electron microscopy, powder X-ray diffraction, BET analysis and spectrofluorometry. The static adsorption of the two MOFs for lead ions (Pb2+) was investigated. Cu(TCPBDA) showed a higher adsorption capacity for Pb2+ compared with Cd(TCPBDA), and its maximum adsorption capacity was 300 mg/g. The adsorption performance of Cu(TCPBDA) was then further studied. It was found that the adsorption of Cu(TCPBDA) for Pb2+ fitted the Freundlich model and pseudo-second-order equation very well. The adsorption ability of Cu(TCPBDA) was applied to fast and efficient adsorption for Pb2+ in toner. The results indicates that Cu(TCPBDA) is a promising material in adsorption and removal of heavy metal ions.

中文翻译：

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两种新型H4TCPBDA基金属-有机骨架的合成及其在铅离子吸附中的应用

基于新配体N,N,N',N'-四(4-羧基苯基)联苯-4,4'-二胺的两种新型多孔金属-有机骨架(MOF)Cu(TCPBDA)和Cd(TCPBDA) (H4TCPBDA)，通过溶剂热法合成，并用扫描电子显微镜、粉末 X 射线衍射、BET 分析和分光光度法表征。研究了两种 MOF 对铅离子 (Pb2+) 的静态吸附。与 Cd(TCPBDA) 相比，Cu(TCPBDA) 对 Pb2+ 表现出更高的吸附容量，其最大吸附容量为 300 mg/g。然后进一步研究了Cu(TCPBDA)的吸附性能。发现Cu(TCPBDA)对Pb2+的吸附符合Freundlich模型和伪二阶方程。Cu(TCPBDA)的吸附能力被应用于对墨粉中Pb2+的快速高效吸附。