Highly efficient and selective capture Pb(II) through a novel metal-organic framework containing bifunctional groups

The design and development of materials with a selective adsorption capacity for Pb(II) are very important for environmental governance and ecological safety. In this work, a novel 3D metal-organic framework ([Cd2H4L4Cl2SO4]center dot 4H(2)O, Cd-MOF) is constructed using a multiple pyrazole heterocycles tetraphenylethylene-based ligand (H4L4) and CdSO4 which containing Pb(II) adsorption sites (SO42-). Studies have shown that the Cd-MOF has outstanding stability, and its maximum adsorption value of Pb(II) can be as high as 845.55 mg/g, which is higher than that of most MOFs or MOFs modified materials. It is worth emphasizing that the Cd-MOF have excellent recyclability due to the unique adsorption mechanism of the Cd-MOF. Thermodynamic studies have shown that Pb(II) adsorption of the Cd-MOF is a spontaneous endothermic process. Specific selective adsorption, exceptional stability and remarkable recyclability make the Cd-MOF a potential material for industrial capture and recovery of Pb(II) from water.

Automated summary

The design and development of materials with a selective adsorption capacity for Pb(II) is crucial for environmental governance and ecological safety. In this study, a novel 3D metal-organic framework (Cd-MOF) was constructed using a multiple pyrazole heterocycles tetraphenylethylene-based ligand (H4L4) and CdSO4, which exhibited excellent stability and a high adsorption capacity for Pb(II). The Cd-MOF showed a maximum adsorption value of 845.55 mg/g, higher than most other MOFs or MOFs modified materials. It also demonstrated remarkable recyclability due to its unique adsorption mechanism. Thermodynamic studies revealed that the adsorption of Pb(II) by Cd-MOF is a spontaneous endothermic process. These features make Cd-MOF a potential material for industrial capture and recovery of Pb(II) from water.