Synthesis of hierarchical MFI zeolites with a micro–macroporous core@mesoporous shell structure

Abstract

Core–shell structured ZSM-5 zeolites (CSSZs) consisting of a micro–macroporous zeolite core and a mesoporous zeolite shell were synthesized by using a bifunctional surfactant containing an alkene group in the hydrophobic tail. The alkene tail and aluminum concentration are the key factors for the formation of the mesoporous shell in CSSZs.