Stable, porous, and bulky particles with high external surface and large pore volume from self-assembly of zeolite nanocrystals with cationic polymer

Jiangwei Song, Limin Ren, Chengyang Yin, Yanyan Ji, Zhifeng Wu, Jixue Li, Feng Shou Xiao

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Stable, porous, and bulky beta zeolite particles (bulky-beta) with high external surface area and large pore volume were fabricated from the self-assembly of beta nanocrystals with cationic polymers under hydrothermal condition, followed by filtration and calcination. The samples were characterized using powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 isotherm, and thermogravimetric analysis-differential thermal analysis. The results show that bulky-beta contains disordered mesopores, and its mesoporous walls are connected by beta nanocrystals with each other. The formation of mesoporosity in bulky-beta is proposed by the use of mesoscale organic template of cationic polymer in the synthesis. The bulky particles of bulky-beta are mechanically stable even if subject to an ultrasonic treatment for 15 min. This is very useful for the separation of zeolite particles from a slurry system via a filtration route. Very interestingly, these particles show almost the same catalytic activity and a very high yield of solid product, compared with nanocrystals of beta zeolite. This method may provide a novel route for the synthesis of catalytically active zeolites, enabling good mass transport as stable and active catalysts in potential industrial applications.

Original languageEnglish (US)
Pages (from-to)8609-8613
Number of pages5
JournalJournal of Physical Chemistry C
Volume112
Issue number23
DOIs
StatePublished - Jun 12 2008

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