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Self‐Pillared Ultramicroporous Carbon Nanoplates for Selective Separation of CH 4 /N 2
Author(s) -
Xu Shuang,
Li WenCui,
Wang ChengTong,
Tang Lei,
Hao GuangPing,
Lu AnHui
Publication year - 2021
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.202014231
Subject(s) - molecular sieve , materials science , chemical engineering , carbon fibers , selectivity , diffusion , nanotechnology , methane , heterojunction , catalysis , chemistry , organic chemistry , composite material , composite number , optoelectronics , physics , engineering , thermodynamics
There is growing evidence that pillaring up a densely packed ultramicroporous two‐dimensional (2D) structure is an effective strategy to reduce their internal diffusion. Reliable pillaring paradigms, however, is rather challenging. Here we report a one‐pot multi‐component sequential assembly method for the preparation of a new self‐pillared 2D polymer and ultramicroporous carbon with integrated surface protrusions. The molecular level pillaring process is surprisingly fast, that is, in 10 min. The thickness of nanoplate edge and the density (roughness), angle as well as height of protrusions can be precisely tuned. Exemplified in coal bed methane purification/separation, this unique pillared 2D carbons exhibit a CH 4 /N 2 selectivity up to 24 at a low CH 4 partial pressure and two orders of magnitude faster CH 4 diffusion kinetics than the commercial carbon molecular sieves. This solution synthesis methodology is generalizable for creation and fine tuning of pillared 2D heterostructures.