Influence of silica precursors on octahedron shaped nano NaY zeolite crystal synthesis

Sharma, Pankaj ORCID: https://orcid.org/0000-0003-2319-260X, Jeong, Su-Jung, Han, Moon-Hee and Cho, Churl-Hee 2015. Influence of silica precursors on octahedron shaped nano NaY zeolite crystal synthesis. Journal of the Taiwan Institute of Chemical Engineers 50 , pp. 259-265. 10.1016/j.jtice.2014.12.025

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Abstract

The present work reports the synthesis of nanosized NaY zeolite crystals from clear solution using different silica sources, i.e., tetramethylammonium silicate (TMAS), colloidal silica suspension (CSS) and tetraethylorthosilicate (TEOS). The examination of phase purity by X-ray diffraction (XRD), morphological studies by scanning electron microscopy (SEM), and evaluation of particle nature and colloidal entities by light scattering analysis (LSA) reveals that the use of different silica sources significantly influenced the properties of final product. The NaY zeolite crystals obtained from TEOS have high phase purity and narrow particle size distribution. SEM and LSA results reveal that the use of TEOS as silica source produces NaY zeolite crystals of average size of 85 nm whereas TMAS yields particle of size around 50 nm but in aggregated form. Furthermore, the prolonged hydrothermal treatment in case of TMAS containing precursor solutions leads to the phase transformation NaY to NaA zeolite by aggregation growth process.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Elsevier
ISSN:	1876-1070
Date of Acceptance:	16 December 2014
Last Modified:	15 Nov 2022 14:30
URI:	https://orca.cardiff.ac.uk/id/eprint/153545

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