2017年10月
Organic-Free Synthesis of a Highly Siliceous Faujasite Zeolite with Spatially Biased Q(4)(nAl) Si Speciation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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- 巻
- 56
- 号
- 43
- 開始ページ
- 13366
- 終了ページ
- 13371
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/anie.201702672
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
We report the most siliceous FAU-type zeolite, HOU-3, prepared via a one-step organic-free synthesis route. Computational studies indicate that it is thermodynamically feasible to synthesize FAU with SAR=2-7, though kinetic factors seemingly impose a more restricted upper limit for HOU-3 (SAR approximate to 3). Our findings suggest that a slow rate of crystallization and/or low concentration of Na+ ions in HOU-3 growth mixtures facilitate Si incorporation into the framework. Interestingly, Q(4)(nAl) Si speciation measured by solid-state NMR can only be modeled with a few combinations of Al positioning at tetrahedral sites in the crystal unit cell, indicating the distribution of Si(-O-Si)(4-n)(-O-Al)(n) species is spatially biased as opposed to being random. Achieving higher SAR is desirable for improved zeolite (hydro)thermal stability and enhanced catalytic performance, which we demonstrate in benchmark tests that show HOU-3 is superior to commercial zeolite Y.
- リンク情報
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- DOI
- https://doi.org/10.1002/anie.201702672
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000412755200034&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85028319234&partnerID=MN8TOARS
- URL
- http://orcid.org/0000-0002-3240-0821
- ID情報
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- DOI : 10.1002/anie.201702672
- ISSN : 1433-7851
- eISSN : 1521-3773
- ORCIDのPut Code : 40012895
- SCOPUS ID : 85028319234
- Web of Science ID : WOS:000412755200034