Ultrathin Metal-Organic Framework Membranes for Molecular Separations: A Mini-Review

Abstract

Metal-organic frameworks (MOFs) have garnered significant interest in membrane-based separations due to their tunable porosity and customizable chemistry. To achieve optimal transport efficiency, researchers are striving to minimize membrane thickness to the greatest extent possible. This mini-review focuses on the development of ultrathin MOF membranes, emphasizing their enhanced separation performance. We discuss the advanced synthesis methods that allow for the precise control of MOF intergrowth, orientation, and flexibility, which are crucial for the fabrication of ultrathin and defect-free membranes. The review

highlights innovative approaches to stabilize ultrathin MOF layers, overcoming challenges related to their mechanical strength and scalability. We also explore the integration of MOF membranes into existing industrial processes, showcasing their efficiency in energy-intensive separations. The review concludes with a perspective on the future directions of MOF membrane research, including the need for large-scale production techniques and the exploration of new fabrication methods for targeted separation tasks. This mini-review serves as a guide for researchers in the field of membrane technology, offering insights into the current state and future possibilities of ultrathin MOF membranes in separation applications.