Synthesis of hierarchical porous zeolite NaY particles with controllable particle sizes

Yi Huang, Kun Wang, Dehua Dong, Dan Li, Matthew R. Hill, Anita J. Hill, Huanting Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Hierarchical porous particles aggregated from primary zeolite NaY nanocrystals were hydrothermally synthesized via a three-stage temperature control strategy, without adding any organic additives. The as-synthesized samples were characterized using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), N-2 sorption, particle size analysis and Fourier Transform Infrared (FT-IR) spectroscopy. The results show that the zeolite aggregate particles with sizes of 190-600 nm are composed of highly crystalline zeolite NaY nanoparticles in the size range of 20-80 nm. The particle sizes of hierarchical porous aggregates can be readily tuned by varying the alkalinity of the zeolite precursor gel without notably changing the sizes of the primary zeolite nanocrystals. N2 sorption results show that zeolite NaY aggregate particles have microporosity and mesoporosity (30.8-57.6%). The hierarchical zeolite particles exhibit very good mechanical stability, and remain intact after ultrasonication for several hours. (C) 2009 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)167-175
Number of pages9
JournalMicroporous and Mesoporous Materials
Volume127
Issue number3
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

Keywords

  • Hierarchical porous structure
  • Zeolite nanocrystals
  • Zeolite spheres
  • Hydrothermal synthesis
  • ROOM-TEMPERATURE
  • SINGLE-CRYSTALS
  • SILICALITE-1 NANOCRYSTALS
  • HYDROTHERMAL SYNTHESIS
  • ELECTRON-MICROSCOPY
  • MOLECULAR-SIEVE
  • MESOPORES
  • UNIFORM
  • TRANSPORT
  • MECHANISM

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