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Molecules 2018, 23(9), 2122;

Influence of Synthesis Method on LTA Time-Dependent Stability

Istituto di Metodologie per l’Analisi Ambientale—IMAA-CNR, 85050 Tito Scalo, Italy
Istituto di Struttura della Materia—ISM-CNR, 85050 Tito Scalo, Italy
Author to whom correspondence should be addressed.
Academic Editors: Bénédicte Lebeau and T. Jean Daou
Received: 1 August 2018 / Revised: 21 August 2018 / Accepted: 22 August 2018 / Published: 23 August 2018
(This article belongs to the Special Issue Microporous/Mesoporous Inorganic Materials)
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Time-stability of LTA zeolite formed by hydrothermal method with or without the action of ultrasonic irradiation was investigated by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The results show that 6 months after the synthesis by hydrothermal process with continuous sonication, LTA evolves into a more stable sodalite, whereas no differences are detected 12 months after LTA synthesis by conventional pre-fused hydrothermal process. These data confirm that using the two approaches, different mechanisms control both zeolite crystallization and time-stability of the newly-formed mineral at solid state. The results are particularly important in the light of the synthetic zeolite application. View Full-Text
Keywords: LTA; zeolite; ultrasonic irradiation; hydrothermal method; stability LTA; zeolite; ultrasonic irradiation; hydrothermal method; stability

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Belviso, C.; Lettino, A.; Cavalcante, F. Influence of Synthesis Method on LTA Time-Dependent Stability. Molecules 2018, 23, 2122.

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