Synthesis of hierarchical Beta using piperidine based multi-ammonium surfactants

Abstract

Hierarchical Beta zeolite was prepared using piperidine based structure directing agents having at least two ammonium groups in their structure. Materials exhibited very high surface area (≈1050 m² g⁻¹), pore volume (2.7 mL g⁻¹), and catalytic activity hitherto reported in the literature. A density functional theoretical study shows that a suitable special orientation of piperidine rings in the structure directing agents is responsible for the formation of hierarchical Beta.