Issue 45, 2021

CO2-selective zeolitic imidazolate framework membrane on graphene oxide nanoribbons: experimental and theoretical studies

Abstract

A CO2-selective ZIF-type membrane was fabricated by growing a ZIF-8 layer on a graphene oxide nanoribbon (GONR)-coated polymeric substrate. Owing to the strong anchoring effect of GONRs to the ZIF-8 crystal, the pore window of the ZIF-8 layer can be tuned with a molecular cut-off range of 3.4–3.6 Å. The prepared membrane showed a CO2 permeance of 7.8 × 10−9 mol m−2 Pa−1 s−1 with a CO2/CH4 selectivity of 27, which surpassed the CO2/hydrocarbon separation performance of most reported ZIF-type membranes and were comparable to those of ZIF-94 type membranes known to be effective for CO2 extraction. Multiscale computational simulation demonstrated that the CO2 selective permeation of the ZIF-8/GONR membrane was attributed to the low diffusivity of CH4 in the rigid ZIF-8 framework. The obtained experimental and computational results illustrate that the pore-tuned ZIF-8 framework can be effectively used for CO2 separation by adjusting the aperture size.

Graphical abstract: CO2-selective zeolitic imidazolate framework membrane on graphene oxide nanoribbons: experimental and theoretical studies

Supplementary files

Article information

Article type
Paper
Submitted
27 Sep 2021
Accepted
27 Oct 2021
First published
29 Oct 2021

J. Mater. Chem. A, 2021,9, 25595-25602

CO2-selective zeolitic imidazolate framework membrane on graphene oxide nanoribbons: experimental and theoretical studies

E. Choi, S. J. Hong, J. Chen, Y. J. Kim, Y. Choi, O. Kwon, K. Eum, J. I. Choi, S. S. Jang, B. Han and D. W. Kim, J. Mater. Chem. A, 2021, 9, 25595 DOI: 10.1039/D1TA08340F

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