STRATEGIES FOR THE SYNTHESIS OF LARGE ZEOLITE SINGLE-CRYSTALS

Citation
S. Qiu et al., STRATEGIES FOR THE SYNTHESIS OF LARGE ZEOLITE SINGLE-CRYSTALS, MICROPOROUS AND MESOPOROUS MATERIALS, 21(4-6), 1998, pp. 245-251
Citations number
31
Categorie Soggetti
Chemistry Physical","Material Science","Chemistry Applied
ISSN journal
13871811
Volume
21
Issue
4-6
Year of publication
1998
Pages
245 - 251
Database
ISI
SICI code
1387-1811(1998)21:4-6<245:SFTSOL>2.0.ZU;2-E
Abstract
The formation of large zeolite single crystals can be achieved by cont rolling the factors affecting the crystallization process. A review of several major strategies for the synthesis of large zeolite single cr ystals based on our studies is presented. Through the addition of a nu cleation suppresser to the reaction mixture and optimization of the sy nthesis conditions, pure uniform large single crystals of LTA and FAU( X) are obtained. Large single crystals of MOR, MFI and BET are prepare d using the 'two-silicon source' technique. In the presence of fluorid e, a large number of single crystals including silicalite-I, B-, Ti-MF I, AlPO4-5, -11, -34, GaPO4, and InPO are promoted. It is found that a clear homogeneous solution favors the crystallization of large single crystals of AFI. The alcoholic synthesis route has proved to be one o f the most effective ways to obtain large single crystals of some zeol ites and metal phosphates. (C) 1998 Elsevier Science B.V. All rights r eserved.