Hierarchical defect-rich UiO-66 membrane towards superior flue gas and butane isomer separations

Hierarchical defect-rich UiO-66 membrane showing unprecedented CO 2 /N 2 and n -/ i -C 4 H 10 separation performances was prepared through combining hollow-structured UiO-66 seeds with epitaxial growth under single-mode microwave heating. Ultrathin-oriented selective top layer, hollow-structured bottom layer, and high missing-linker number in the framework were concurrently achieved in the membrane.