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

authored by: 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.
Organisation(s): Institute of Physical Chemistry and Electrochemistry
External Organisation(s): East China Normal University
National University of Singapore
Type: Article
Journal: Chemical engineering journal
Volume: 498
ISSN: 1385-8947
Publication date: 15.10.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Chemistry, Environmental Chemistry, General Chemical Engineering, Industrial and Manufacturing Engineering
Electronic version(s): https://doi.org/10.1016/j.cej.2024.155773 (Access: Closed)

BibTeX

@article{bd618633bd2547bc9e2f6c8dc40160d1,
title = "Electric field-driven assembly of (110) oriented metal–organic framework ZIF-8 monolayer with high hydrogen selectivity",
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.",
keywords = "Electric-field-driven strategy, Hydrogen separation, Metal-organic frameworks membranes, Oriented ZIF-8 membrane",
author = "Chunxin Jin and Shuai Liu and Rui Zheng and Yanhong Li and Xiaofang Chen and J{\"u}rgen Caro and Jianwen Jiang and Aisheng Huang",
note = "Publisher Copyright: {\textcopyright} 2024",
year = "2024",
month = oct,
day = "15",
doi = "10.1016/j.cej.2024.155773",
language = "English",
volume = "498",
journal = "Chemical engineering journal",
issn = "1385-8947",
publisher = "Elsevier",
}