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
05 شوال 1439
Accepted
27 ذو الحجة 1439
First published
27 ذو الحجة 1439

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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