Heterostructured two-dimensional covalent organic framework membranes for enhanced ion separation. 2022

Zhe Zhang, and Ankang Xiao, and Congcong Yin, and Xingyuan Wang, and Xiansong Shi, and Yong Wang
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China. xsshi@njtech.edu.cn.

A heterostructured covalent organic framework (COF) membrane is synthesized via in situ linker exchange. Narrowed pores can be formed at the interface between two types of COFs by adjusting the linker exchange duration. The resultant COF membrane demonstrates a high rejection rate toward Na2SO4 of up to 97%.

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