Preparation and Application of CuBDC-NH2/PmPD Mixed Matrix Membranes for Photothermal Conversion

A kind of metal-organic framework(MOF)-based mixed matrix membranes(MMMs) with excellent photo ⁃ thermal conversion performance was prepared by a simple and efficient soft spray technique in this paper. A small amount of copper ions is uniformly sprayed on the surface of the mixed solution containing 2-aminoterephthalic acid (H2BDC-NH2)and m-phenylenediamine(mPD), and the copper ions simultaneously initiate the self-assembly of MOFs and monomer polymerization to form a large-area CuBDC-NH2/PmPD MMM with homogeneous MOF at the gas-liquid interface. This method not only is simple and efficient, but also can synthesize mixed matrix membranes with uniform MOF distribution in one step due to the dual action of copper ions. The MMMs obtained by this synchronous synthesis method has good integrity and shows excellent solar water evaporation capacity, which can be used for high-efficiency seawater desalination, and it's expected to play a role in desalination of seawater.