Fabrication of Oriented MOF‐Based Mixed Matrix Membrane via Ion‐Induced Synchronous Synthesis

Abstract Developing a facile strategy for constructing oriented mixed matrix membranes (MMMs) with uniformly dispersed and high‐loading metal–organic frameworks (MOFs) is a crucial scientific challenge in probing the enhanced capability and potential applications of MOF‐polymer MMMs. Herein, a novel synchronous synthetic method for constructing oriented CuBDC/poly(m‐phenylenediamine) (CuBDC/PmPD) MMM with uniform MOF dispersion at high loading at the air–solution interface via the dual function of metal ions is reported. The resulting MMM exhibits excellent separation performance in ion sieving and seawater desalination due to the structural integrity of the proposed membrane and the highly interconnected channels created through the oriented distribution of MOF in a polymer matrix. Such a cutting‐edge approach may provide promising insights into the development of advanced MMMs with optimized structure and superior performances.