A bi-model mesoporous single-crystalline hierarchical zeolite

Hierarchical zeolites become a research hotspot in the fields of zeolites and hetero-catalysis due to their improved utilization efficiency of micropores after introducing mesopores (2–50 nm). Here, a foam-like hierarchical zeolite comprised of many aggregated identical-lattice-direction hollow nanocrystals was firstly synthesized by selectively etching a pre-formed hierarchical zeolite, which achieved a new height in catalytic performance for olefin epoxidation.