Synthesis of all-silica zeolites from highly concentrated gels containing hexamethonium cations

Xiaolong Liu, Ugo Ravon, Alain Tuel

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A pure and highly crystalline all-silica EU-1 zeolite has been obtained from the crystallization of gels containing very low water contents in the presence of hexamethonium cations. Decreasing the water content in the gel down to H 2O/Si < 1 inhibited the formation of ZSM-48, which is usually observed under more diluted standard crystallization conditions. Moreover, addition of NH 4F to the synthesis led to the formation of "half-fluorinated" ITQ-13 in which fluoride anions occupied only the center of D4R cages. In larger cages, the charge of the template was compensated by framework connectivity defects, clearly demonstrating once more the essential role of F - in the formation of D4R units. The formation of such hybrid (F,OH) is particularly interesting from a synthesis point of view, particularly for understanding the respective roles of fluoride and hydroxide anions in the crystallization process. © 2012 Elsevier Inc. All rights reserved.
Original languageEnglish (US)
Pages (from-to)257-261
Number of pages5
JournalMicroporous and Mesoporous Materials
StatePublished - Jul 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): UK-C0017
Acknowledgements: This publication is based on the work supported by Award No. UK-C0017, made by King Abdullah University of Science and Technology (KAUST). The authors would like to thank Dr. Aude Demessence for SEM pictures.

ASJC Scopus subject areas

  • Mechanics of Materials
  • General Materials Science
  • General Chemistry
  • Condensed Matter Physics


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