Heavy-Metal Ions Removal and Iodine Capture by Terpyridine Covalent Organic Frameworks.

Autor: Wang HZ; Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China., Chan MH; Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China., Yam VW; Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2024 Nov; Vol. 8 (11), pp. e2400465. Date of Electronic Publication: 2024 Jul 25.
DOI: 10.1002/smtd.202400465
Abstrakt: Porous materials are excellent candidates for water remediation in environmental issues. However, it is still a key challenge to design efficient adsorbents for rapid water purification from various heavy metal ions-contaminated wastewater in one step. Here, two robust nitrogen-rich covalent organic frameworks (COFs) bearing terpyridine units on the pore walls by a "bottom-up" strategy are reported. Benefitting from the strong chelation interaction between the terpyridine units and various heavy metal ions, these two terpyridine COFs show excellent removal efficiency and capability for Pb 2+ , Hg 2+ , Cu 2+ , Ag + , Cd 2+ , Ni 2+ , and Cr 3+ from water. These COFs are shown to remove such heavy metal ions with >90% of contents at one time after the aqueous metal ions mixture is passed through the COF filter. The nitrogen-rich features of the COFs also endow them with the capability of capturing iodine vapors, offering the terpyridine COFs the potential for environmental remediation applications.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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