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Fabrication of Crystalline Microporous Membrane from 2D MOF Nanosheets for Gas Separation
Author(s) -
Jiang Shuangshuang,
Shi Xinli,
Sun Fuxing,
Zhu Guangshan
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000143
Subject(s) - permeance , selectivity , microporous material , membrane , permeation , gas separation , chemical engineering , materials science , adsorption , exfoliation joint , filtration (mathematics) , metal organic framework , fabrication , nanotechnology , chemistry , organic chemistry , composite material , catalysis , graphene , biochemistry , engineering , medicine , statistics , mathematics , alternative medicine , pathology
Abstract Metal‐organic frameworks (MOFs)‐based membranes have shown great potentials as applications in gas separation. In this work, a uniform membrane based on 2D MOF Ni 3 (HITP) 2 (HITP=2,3,6,7,10,11‐hexaaminotriphenylene) was fabricated on ordered macroporous AAO via the filtration method. To fabricate the membrane, we obtained the Ni 3 (HITP) 2 nanosheets as building blocks via a soft‐physical exfoliation method successfully that were confirmed by AFM and TEM. We also studied the H 2 , CO 2 and N 2 adsorption isotherms of Ni 3 (HITP) 2 powder at room temperature, which shows Ni 3 (HITP) 2 has high heats of adsorption for CO 2 and high selectivity of CO 2 over N 2 . Gas permeation tests indicate that the Ni 3 (HITP) 2 membrane shows high permeance and selectivity of CO 2 over N 2 , as well as good selectivity of H 2 over N 2 . The ideal separation factors of CO 2 /N 2 and H 2 /N 2 from sing‐gas permeances are 13.6 and 7.8 respectively, with CO 2 permeance of 3.15×10 −6 mol⋅m −2 ⋅s −1 ⋅Pa −1 . The membrane also showed good stability, durability and reproducibility, which are of potential interest for practical applications in the CO 2 separations.