School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China.
College of Pharmaceutical Engineering, Xinyang Agricultural and Forestry University, Henan 464000, People's Republic of China.
J Hazard Mater. 2022 Apr 5;427:127852. doi: 10.1016/j.jhazmat.2021.127852. Epub 2021 Nov 21.
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 ([CdHLClSO]·4HO, Cd-MOF) is constructed using a multiple pyrazole heterocycles tetraphenylethylene-based ligand (HL) and CdSO which containing Pb(II) adsorption sites (SO). 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.
设计和开发对 Pb(II) 具有选择性吸附能力的材料对于环境治理和生态安全非常重要。在这项工作中，使用一种新型的多吡唑杂环四苯乙烯基配体（HL）和含有 Pb(II) 吸附位（SO）的 CdSO 构建了一种新颖的 3D 金属有机骨架（[CdHLClSO]·4H O，Cd-MOF）。研究表明，Cd-MOF 具有出色的稳定性，其对 Pb(II) 的最大吸附值可高达 845.55 mg/g，高于大多数 MOFs 或 MOFs 改性材料。值得强调的是，由于 Cd-MOF 的独特吸附机制，Cd-MOF 具有优异的可回收性。热力学研究表明，Cd-MOF 对 Pb(II) 的吸附是一个自发的吸热过程。特异性选择性吸附、卓越的稳定性和显著的可回收性使 Cd-MOF 成为一种有潜力的材料，可用于从水中工业捕获和回收 Pb(II)。
