Premium
Boron Nitride Membranes with a Distinct Nanoconfinement Effect for Efficient Ethylene/Ethane Separation
Author(s) -
Dou Haozhen,
Jiang Bin,
Xu Mi,
Zhang Zhen,
Wen Guobin,
Peng Feifei,
Yu Aiping,
Bai Zhengyu,
Sun Yongli,
Zhang Luhong,
Jiang Zhongyi,
Chen Zhongwei
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201907773
Subject(s) - permeance , membrane , selectivity , boron nitride , ethylene , chemical engineering , ionic liquid , materials science , boron , ionic bonding , nanotechnology , chemistry , ion , organic chemistry , catalysis , biochemistry , engineering
Abstract A BN membrane with a distinct nanoconfinement effect toward efficient ethylene/ethane separation is presented. The horizontal and inclined self‐assembly of 2D BN nanosheets endow the BN membrane with abundant percolating nanochannels, and these nanochannels are further decorated by reactive ionic liquids (RILs) to tailor their sizes as well as to achieve nanoconfinement effect. The noncovalent interactions between RIL and BN nanosheets favor the ordered alignment of the cations and anions of RIL within BN nanochannels, which contributes to a fast and selective ethylene transport. The resultant membranes exhibit an unprecedented separation performance with superhigh C 2 H 4 permeance of 138 GPU and C 2 H 4 /C 2 H 6 selectivity of 128 as well as remarkably improved long‐term stability for 180 h, outperforming reported state‐of‐the‐art membranes.