Naslov
3D Study of the Morphology and Dynamics of Zeolite Nucleation

Autori
Melinte, Georgian ; Georgieva, Veselina ; Springuel-Huet, Marie-Anne ; Nossov, Andrei ; Ersen, Ovidiu ; Guenneau, Flavien ; Gedeon, Antoine ; Palčić, Ana ; Bozhilov, Krassimir N. ; Pham-Huu, Cuong ; Qiu, Shilun ; Mintova, Svetlana ; Valtchev, Valentin

Izvornik
Chemistry : a European journal (0947-6539) 21 (2015), 50; 18316-18327

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
crystal engineering; crystal growth; nanoparticles; NMR spectroscopy; zeolites

Sažetak
The principle aspects and constraints of the dynamics and kinetics of zeolite nucleation in ydrogel systems are analyzed on the basis of a odel Na-rich aluminosilicate system. A detailed ime-series EMT-type zeolite crystallization study in the model hydrogel system was performed to lucidate 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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA