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3D study of morphology and dynamics of zeolite nucleation

Melinte, Georgian; Georgieva, Veselina; Springuel-Huet, Marie-Anne; Nossov, Andreï; Ersen, Ovidiu; Guenneau, Flavien; Gedeon, Antoine; Palčić, Ana; Bozhilov, Krassimir N.; Pham-Huu, Cuong; Qiu, Shilun; Mintova, Svetlana; Valtchev, Valentin (2015) 3D study of morphology and dynamics of zeolite nucleation. Chemistry - A European Journal, 21 (50). pp. 18316-18327. ISSN 0947-6539

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The principle aspects and constrains 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 is performed in order to elucidate the topological and temporal aspects of zeolite nucleation. A comprehensive set of analytical tools and methods is employed to analyze the gel evolution complementing 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 gel particle shell in zeolite nucleation, can be used to control the growth process and properties of zeolites formed in hydrogels.

Item Type: Article
Uncontrolled Keywords: crystal engineering; crystal growth; nanoparticles; NMR spectroscopy; zeolites
Subjects: NATURAL SCIENCES > Chemistry > Physical Chemistry
NATURAL SCIENCES > Chemistry > Inorganic Chemistry
NATURAL SCIENCES > Chemistry > Applied Chemistry
Divisions: Division of Materials Chemistry
Depositing User: Ana Palčić
Date Deposited: 11 Oct 2018 10:13
DOI: 10.1002/chem.201501919

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