Premium
Endowing g‐C 3 N 4 Membranes with Superior Permeability and Stability by Using Acid Spacers
Author(s) -
Ran Jin,
Pan Ting,
Wu Yuying,
Chu Chengquan,
Cui Peng,
Zhang Pengpeng,
Ai Xinyu,
Fu CenFeng,
Yang Zhengjin,
Xu Tongwen
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201908786
Subject(s) - permeance , membrane , stacking , intercalation (chemistry) , phenylene , molecule , base (topology) , benzene , oxide , protonation , materials science , permeability (electromagnetism) , polymer chemistry , crystallography , chemistry , polymer , organic chemistry , permeation , composite material , mathematics , ion , mathematical analysis , biochemistry
g‐C 3 N 4 membranes were modulated by intercalating molecules with SO 3 H and benzene moieties between layers. The intercalation molecules break up the tightly stacking structure of g‐C 3 N 4 laminates successfully and accordingly the modified g‐C 3 N 4 membranes give rise to two orders magnitude higher water permeances without sacrificing the separation efficiency. The sulfonated poly(2,6‐dimethyl‐1,4‐phenylene oxide) (SPPO)/g‐C 3 N 4 with a thickness of 350 nm presents an exceptionally high water permeance of 8867 L h −1 m −2 bar −1 and 100 % rejection towards methyl blue, while the original g‐C 3 N 4 membrane with a thickness of 226 nm only exhibits a permeance of 60 L h −1 m −2 bar −1 . Simultaneously, SO 3 H sites firmly anchor nitrogen with base functionality distributing onto g‐C 3 N 4 through acid–base interactions. This enables the nanochannels of g‐C 3 N 4 based membranes to be stabilized in acid, basic, and also high‐pressure environments for long periods.