Template-free synthesis and structural evolution of discrete hydroxycancrinite zeolite nanorods from high-concentration hydrogels

Shaojiang Chen, Lukas P. Sorge, Dong Kyun Seo

Research output: Contribution to journalArticle

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Abstract

We report the synthesis and characterization of hydroxycancrinite zeolite nanorods by a simple hydrothermal treatment of aluminosilicate hydrogels at high concentrations of precursors without the use of structure-directing agents. Transmission electron microscopy (TEM) analysis reveals that cancrinite nanorods, with lengths of 200-800 nm and diameters of 30-50 nm, exhibit a hexagonal morphology and are elongated along the crystallographic c direction. The powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) and TEM studies revealed sequential events of hydrogel formation, the formation of aggregated sodalite nuclei, the conversion of sodalite to cancrinite and finally the growth of cancrinite nanorods into discrete particles. The aqueous dispersion of the discrete nanorods displays a good stability between pH 6-12 with the zeta potential no greater than -30 mV. The synthesis is unique in that the initial aggregated nanocrystals do not grow into microsized particles (aggregative growth) but into discrete nanorods. Our findings demonstrate an unconventional possibility that discrete zeolite nanocrystals could be produced from a concentrated hydrogel.

Original languageEnglish
Pages (from-to)18804-18811
Number of pages8
JournalNanoscale
Volume9
Issue number47
DOIs
Publication statusPublished - Dec 21 2017

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Zeolites
Hydrogels
Nanorods
Hydrogel
Nanocrystals
Transmission electron microscopy
Aluminosilicates
Zeta potential
X ray powder diffraction
Fourier transforms
Infrared radiation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Template-free synthesis and structural evolution of discrete hydroxycancrinite zeolite nanorods from high-concentration hydrogels. / Chen, Shaojiang; Sorge, Lukas P.; Seo, Dong Kyun.

In: Nanoscale, Vol. 9, No. 47, 21.12.2017, p. 18804-18811.

Research output: Contribution to journalArticle

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