Synthesis and structure of a CDO zeolite precursor with a high Al content
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- Title
- Synthesis and structure of a CDO zeolite precursor with a high Al content
- Authors
- Ahn, Sang Hyun; Seo, Seungwan; Lee, Hwajun; Hong, Suk Bong
- Date Issued
- 2018-11
- Publisher
- ROYAL SOC CHEMISTRY
- 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 C-13 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 angstrom. Its calcination led to a condensation along the a-axis, yielding a highly crystalline CDO zeolite.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95484
- DOI
- 10.1039/c8qi00576a
- ISSN
- 2052-1553
- Article Type
- Article
- Citation
- INORGANIC CHEMISTRY FRONTIERS, vol. 5, no. 11, page. 2792 - 2797, 2018-11
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