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A Regularly Channeled Lamellar Membrane for Unparalleled Water and Organics Permeation
Author(s) -
Wang Jingtao,
Chen Pingping,
Shi Benbing,
Guo Weiwei,
Jaroniec Mietek,
Qiao ShiZhang
Publication year - 2018
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.201801094
Subject(s) - permeance , permeation , membrane , lamellar structure , materials science , stacking , fabrication , chemical engineering , nanotechnology , chemistry , chemical physics , composite material , organic chemistry , engineering , medicine , biochemistry , alternative medicine , pathology
Lamellar membranes show exceptional molecular permeation properties of key importance for many applications. However, their design and development need the construction of regular and straight interlayer channels and the establishment of corresponding transport rate equation. The fabrication of a uniformly lamellar membrane is reported using double‐layered Ti 3 C 2 T x MXenes as rigid building blocks. This membrane possesses ordered and straight 2 nm channels formed via a direct self‐stacking, in contrast to the conventional irregular ones from flexible sheets. Such channels permit precise molecular rejection and unparalleled molecular permeation. The permeance of water and organics by this membrane reached 2300 and 5000 L m −2 h −1 bar −1 , respectively. The molecular transfer mechanism in confined nanochannels, and the corresponding model equation are established, paving a way to nanoscale design of highly efficient channeled membranes for transport and separation applications.