Cover Feature: Hierarchical Nanostructures of Metal‐Organic Frameworks Applied in Gas Separating ZIF‐8‐on‐ZIF‐67 Membranes (Chem. Eur. J. 22/2018)

Hierarchical ZIF-8-on-ZIF-67 gas separation membranes: It is possible to synthesize hierarchical thin layers and nanoparticles with precise growth control on the nanometer scale by self-assembly. The neat ZIF-8-on-ZIF-67 layers are supported α-Al2O3, while nanoparticles are embedded in free-standing mixed-matrix membranes. The ZIF-8-on-ZIF-67 membranes show increased performance compared with membranes with only ZIF-8 or ZIF-67. More information can be found in the Communication by A. Knebel et al. on page 5728.