COF Scaffold Membrane with Gate-Lane Nanostructure for Efficient Li⁺/Mg²⁺ Separation.

ABSTRACT: Due to complex ion-ion and ion-membrane interactions, creating innovative membrane structures to acquire favorable ion mixing effect and high separation performance remains a big challenge. Herein, we design covalent organic framework (COF) scaffold membrane with gate-lane nanostructure for efficient Li⁺/Mg²⁺ separation. COF nanosheets, serving as the scaffold, are intercalated by polyethyleneimine (PEI) to form the permeating layer. Subsequently, PEI on the surface reacts with 1,4-phenylene diisocyanate to form the polyurea gating layer. The gating layer, bearing tailored smaller pore size, affords high rejection to co-ions (Mg²⁺) and thus high Li⁺/Mg²⁺ selectivity. The permeating layer, with asymmetric charge and spatial nanostructur

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC12757503 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature