Two-Dimensional Microporous Material-based Mixed Matrix Membranes for Gas Separation

Since the discovery of graphene and its derivatives, the development and application of two-dimensional (2D) materials have attracted enormous attention. 2D microporous materials, such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), graphitic carbon nitride (g-C₃ N₄ ) and so on, hold great potential to be used in gas separation membranes because of their high aspect ratio and homogeneously distributed nanometer pores, which are beneficial for improving gas permeability and selectivity. This review briefly summarizes the recent design and fabrication of 2D microporous materials, as well as their applications in mixed matrix membranes (MMMs) for gas separation. The enhanced separation performances of the membranes and their long-term stability are also introduced. Challenges and the latest development of newly synthesized 2D microporous materials are finally discussed to foresee the potential opportunities for 2D microporous material-based MMMs.