Electric field-driven assembly of (110) oriented metal–organic framework ZIF-8 monolayer with high hydrogen selectivity

verfasst von
Chunxin Jin, Shuai Liu, Rui Zheng, Yanhong Li, Xiaofang Chen, Jürgen Caro, Jianwen Jiang, Aisheng Huang
Abstract

Metal-organic framework (MOF) membranes have showed great potential in gas separation. To date, it is still a great challenge to precisely control the optimal orientation of MOF membranes with an enhanced gas separation performance. Herein, we prepared a compact and (110) oriented ZIF-8 membrane with a thickness of about 265 nm on graphite substrate within 1 h at room temperature via electric-field-driven strategy. Since the membrane is an intergrown one-crystal layer, grain boundary retardation of the flux is eliminated. Furthermore, due to the reduction of the transport pathways through the oriented structure, the (110) oriented ZIF-8 membrane exhibits a high gas separation performance. At 100 °C and 1 bar for the separation of equimolar binary gas mixtures H2/CO2, H2/CH4 and H2/C3H8, separation factors of 49.5, 90.9 and 121.8 can be obtained, with H2 permeance of about 1.7 × 10-7 mol·m−2·s−1·Pa−1. The developed strategy exhibits excellent reproducibility and scalability, and a large area ZIF-8 membrane can be consistently prepared on the graphite substrate, thus facilitating the preparation and application of the ZIF-8 membrane on a large scale. Further, the electric-field-driven strategy is also helpful for the preparation oriented ZIF-67 and ZIF-L membranes, confirming its versatility for the preparation of oriented MOF membranes.

Organisationseinheit(en)
Institut für Physikalische Chemie und Elektrochemie
Externe Organisation(en)
East China Normal University
National University of Singapore
Typ
Artikel
Journal
Chemical engineering journal
Band
498
ISSN
1385-8947
Publikationsdatum
15.10.2024
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeine Chemie, Umweltchemie, Allgemeine chemische Verfahrenstechnik, Wirtschaftsingenieurwesen und Fertigungstechnik
Elektronische Version(en)
https://doi.org/10.1016/j.cej.2024.155773 (Zugang: Geschlossen)