Synthesis and structure of a CDO zeolite precursor with a high Al content†,Inorganic Chemistry Frontiers

当前位置： X-MOL 学术 › Inorg. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Synthesis and structure of a CDO zeolite precursor with a high Al content†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-09-07 00:00:00 , DOI: 10.1039/c8qi00576a
Sang Hyun Ahn _{1,

2,

3,

4,

5} , Seungwan Seo _{1,

2,

3,

4,

5} , Hwajun Lee _{1,

2,

3,

4,

5} , Suk Bong Hong _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

高Al含量的CDO沸石前驱体的合成和结构†

使用四乙基铵（TEA ⁺）和四甲基铵（TMA ⁺）在氟化物介质中的离子。然而，这两种元素分析和^13个C ^ MAS NMR结果揭示TEA的存在⁺只在PreCDO，虽然这种层状相没有没有TMA结晶⁺或F ^-存在。通过同步加速器X射线衍射Rietveld分析和计算建模相结合解决了PreCDO的结构，结果表明镁碱沸石（fer）PreCDO的层以2.7的层间距离堆叠。其煅烧导致沿a轴的缩合，产生高度结晶的CDO沸石。

更新日期：2018-09-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11