Issue 14, 2021

Covalent organic framework-based membranes for liquid separation

Abstract

Covalent organic frameworks (COFs) are a class of organic porous polymers with regular pore structures, which are connected by organic building units through covalent bonds. The unique features of COFs, such as regular pore, uniform pore size and tunable pore environment, provide great potential in the field of membrane separation. In this review, we focus on the COF-based membranes for liquid separation. We first summarize their synthesis and characterization methods, and briefly discuss the separation mechanism and the key factors for improving their separation performance. Then, we give an introduction to the liquid separation of COF membranes from three aspects: water treatment, the recovery and purification of organic solvents, and chiral separation. Finally, a perspective on the opportunities and challenges for next-generation COF-based membranes for liquid separation is given.

Graphical abstract: Covalent organic framework-based membranes for liquid separation

Article information

Article type
Review Article
Submitted
02 nov 2020
Accepted
26 apr 2021
First published
05 maj 2021

Org. Chem. Front., 2021,8, 3943-3967

Covalent organic framework-based membranes for liquid separation

S. Zhang, S. Zhao, X. Jing, Z. Niu and X. Feng, Org. Chem. Front., 2021, 8, 3943 DOI: 10.1039/D0QO01354D

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