Secondary template-free synthesis of hierarchical beta zeolite nanocrystals with tunable porosity and size.

Mesoporous Beta zeolite nanocrystals with tunable porosity and size have been facilely prepared without additional mesoporous template or post-synthetic procedure. This synthetic strategy for mesoporosity could be realized by simply adjusting the reaction conditions without any special raw material. The as-prepared mesoporous Beta zeolite exhibits much higher adsorption efficiency compared with the bulk phase. The shorten crystallization time (8 h) and high yield (99%) allow this strategy suitable for the large-scale synthesis of mesoporous Beta zeolite with low cost. Image 1 • Mesoporous beta zeolite nanocrystals were synthesized in high yield. • No additional mesoporous template or post-synthetic modification was involved. • The particle size and mesopore size were tunable. • The meso-beta showed much higher adsorption efficiency than that of bulk-beta. [ABSTRACT FROM AUTHOR]