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3D Study of the Morphology and Dynamics of Zeolite Nucleation
Author(s) -
Melinte Georgian,
Georgieva Veselina,
SpringuelHuet MarieAnne,
Nossov Andreï,
Ersen Ovidiu,
Guenneau Flavien,
Gedeon Antoine,
Palčić Ana,
Bozhilov Krassimir N.,
PhamHuu Cuong,
Qiu Shilun,
Mintova Svetlana,
Valtchev Valentin
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201501919
Subject(s) - nucleation , zeolite , aluminosilicate , crystallization , materials science , kinetics , chemical engineering , particle (ecology) , shell (structure) , chemical physics , crystallography , chemistry , composite material , catalysis , organic chemistry , physics , oceanography , quantum mechanics , engineering , geology
The principle aspects and constraints of the dynamics and kinetics of zeolite nucleation in hydrogel systems are analyzed on the basis of a model Na‐rich aluminosilicate system. A detailed time‐series EMT‐type zeolite crystallization study in the model hydrogel system was performed to elucidate the topological and temporal aspects of zeolite nucleation. A comprehensive set of analytical tools and methods was employed to analyze the gel evolution and complement the primary methods of transmission electron microscopy (TEM) and nuclear magnetic resonance (NMR) spectroscopy. TEM tomography reveals that the initial gel particles exhibit a core–shell structure. Zeolite nucleation is topologically limited to this shell structure and the kinetics of nucleation is controlled by the shell integrity. The induction period extends to the moment when the shell is consumed and the bulk solution can react with the core of the gel particles. These new findings, in particular the importance of the gel particle shell in zeolite nucleation, can be used to control the growth process and properties of zeolites formed in hydrogels.