文献类型：期刊文献

英文题名：Preparation of covalent organic framework with carboxy and triazine for efficient removal of Pb2+ions

作者：Ma, Qi[1,2];Liu, Xiaoyun[1];Qian, Jun[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[2]Jiangnan Shipyard Grp Co Ltd, Jiangnan Inst Technol, Shanghai 201913, Peoples R China

年份：2023

卷号：323

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20232714330913);WOS:【SCI-EXPANDED(收录号:WOS:001036502300001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22171086, 52073091, and 51773060) , and Shanghai Natural Science Foundation (20ZR1414600) .

语种：英文

外文关键词：Covalent organic framework; Removal; Pb2+ions; Carboxy; Triazine

摘要：Recently, the development of high-selectivity porous materials has attracted much attention due to the long-term accumulation of heavy metals in the aquatic environment. Covalent organic frameworks (COFs) show great potential as sustainable porous materials, possessing several properties that make them suitable for sewage purification and rapid adsorption. In this paper, two novel COFs containing triazine and carboxyl bifunctional groups, DAA-TFPT-COF and PDA-TFPT-COF, were developed. The DAA-TFPT-COF and PDA-TFPT-COF have high specific surface areas and good metal ion adsorption properties. Moreover, they have behaved good metal ion adsorption ability in not only acidic but also alkaline environments, which is superior to ordinary adsorption materials. The maximum adsorption amount of the DAA-TFPT-COF was up to approximately 128 mg g-1 for Pb2+ ions. Additionally, the results of the simulation indicated that both COFs were consistent with the Langmuir adsorption model and the pseudo-second-order kinetic model, confirming the chemical adsorption process that occurs within the COFs. The strong adsorption effect in the COFs can be attributed to the electrostatic in-teractions between the COF and Pb2+ ions. This also shows that the active affinity sites in the system play a crucial role in the metal ion capture process. DAA-TFPT-COF has a high partition coefficient, and exhibited fast adsorption kinetics, which makes it an excellent candidate for metal ion adsorption.