Mechanism of Zeolite A Nanocrystal Growth from Colloids at Room Temperature-Reference-Cited by-全球学者库

Mechanism of Zeolite A Nanocrystal Growth from Colloids at Room Temperature

Published:1999-02-12 Issue:5404 Volume:283 Page:958-960
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Mintova Svetlana¹²,Olson Norman H.³,Valtchev Valentin²,Bein Thomas¹

Affiliation:

1. Department of Chemistry,

2. Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 92 Rakovski Street, 1000 Sofia, Bulgaria.

3. Department of Biology, Purdue University, West Lafayette, IN 47907, USA.

Abstract

The formation and growth of crystal nuclei of zeolite A from clear solutions at room temperature were studied with low-dose, high-resolution transmission electron microscopy in field emission mode and with in situ dynamic light scattering. Single zeolite A crystals nucleated in amorphous gel particles of 40 to 80 nanometers within 3 days at room temperature. The resulting nanoscale single crystals (10 to 30 nanometers) were embedded in the amorphous gel particles. The gel particles were consumed during further crystal growth at room temperature, forming a colloidal suspension of zeolite A nanocrystals of 40 to 80 nanometers. On heating this suspension at 80°C, solution-mediated transport resulted in additional substantial crystal growth.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference32 articles.

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5. W. M. Meier D. H. Olson Ch. Baerlocher Atlas of Zeolite Structure Types (Elsevier London 1996).

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