Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation.

ABSTRACT: Precise ions sieving at angstrom-scale is gaining tremendous attention thanks to its significant impact at the water-energy nexus. Herein, a novel polycation-modulated interfacial polymerization (IP) strategy is developed to prepare a heterogeneously charged covalent organic frameworks (COFs) membrane. Cationic poly(diallyldimethylammonium chloride) (PDDA) regulates the growth and assembly of anionic COFs nanosheets, which thus provides a negative, smooth top surface and positive, rough bottom surface, indicating the presence of heterogeneously charged angstrom-scale channels through the membrane. Experiments and simulations are conducted to understand the facilitated ions transport behavior relative to specific interactions raised by heterogeneously charged channels and angstrom-scale ste

SUBMITTER: Xu S 

PROVIDER: S-EPMC11672246 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature