Issue 11, 2018

Synthesis and structure of a CDO zeolite precursor with a high Al content

Abstract

A new CDO zeolite precursor (PreCDO) with a Si/Al ratio of 8.7, the lowest among the layered precursors of this channel-based small-pore zeolite reported so far, has been synthesized using tetraethylammonium (TEA+) and tetramethylammonium (TMA+) ions in fluoride media. However, both the elemental analysis and 13C MAS NMR results reveal the presence of TEA+ only in PreCDO, although this layered phase did not crystallize without TMA+ or F present. The structure of PreCDO solved by a combination of synchrotron X-ray diffraction Rietveld analysis and computational modeling shows that the ferrierite (fer) layers of PreCDO are stacked with an interlayer distance of 2.7 Å. Its calcination led to a condensation along the a-axis, yielding a highly crystalline CDO zeolite.

Graphical abstract: Synthesis and structure of a CDO zeolite precursor with a high Al content

Supplementary files

Article information

Article type
Research Article
Submitted
19 Чер 2018
Accepted
07 Вер 2018
First published
07 Вер 2018

Inorg. Chem. Front., 2018,5, 2792-2797

Synthesis and structure of a CDO zeolite precursor with a high Al content

S. H. Ahn, S. Seo, H. Lee and S. B. Hong, Inorg. Chem. Front., 2018, 5, 2792 DOI: 10.1039/C8QI00576A

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