Structural Characterization of Interlayer Expanded Zeolite Prepared From Ferrierite Lamellar Precursor
Structural Characterization of Interlayer Expanded Zeolite Prepared From Ferrierite Lamellar Precursor
复制标题
镁碱沸石层状前驱体制备的层间膨胀沸石的结构表征
DOI：
10.1021/cm900645c
复制
发表时间：
2009-05
影响因子：
8.6
通讯作者：
Zhao, Zhonglin
中科院分区：
文献类型：
--
作者：
Wu, Leilei;Wu, Peng;Terasaki, Osamu;Slater, Ben;Ruan, Juanfang;Zhao, Zhonglin
通过分子烷氧基硅烷化反应成功地拓展了层状沸石前驱体的结构。该方法已应用于PREFER（镁碱沸石的层状前体）。结果表明，通过层间分子烷氧基硅烷化反应，合成了一种垂直于层间距离增大的新型晶型层间膨胀沸石IEZ-FER（IEZ是interlayer expanded zeolite的缩写）。本文采用电子衍射、高分辨电子显微镜（HREM）和结构模拟等手段对IEZ-FER的结构进行了全面的研究。我们的研究提供的证据表明，IEZ-FER保留了对应于已知的三维（3D）FER沸石中发现的pentasil层，但它也显示了层间距（105 A）的明显扩大。新形成的通道系统不同于已知的3D FER结构，其具有沿[010]和[001]方向沿着的8元环（MR）和10元MR孔。
A novel methodology was successfully developed to expand the structure of zeolitic lamellar precursors through molecular alkoxysilylation. The method has been applied to PREFER (lamellar precursor of ferrierite). As a result, a novel crystalline interlayer expanded zeolite named as IEZ-FER (IEZ is the abbreviation of interlayer expanded zeolite) with enlarged distance perpendicular to the layer was synthesized through interlayer molecular alkoxysilylation. In this paper, the structure of IEZ-FER has been comprehensively studied by various means such as electron diffraction, high-resolution electron microscopy (HREM) and structure modeling. Our studies provide evidence that IEZ-FER preserves the pentasil layers corresponding to that found in the known three-dimensional (3D) FER zeolite, but it also shows a distinct expansion of the layer spacing (∼5 A). The newly formed channel system is distinct from that of the known 3D FER structure,which has 8-membered ring (MR) and 10MR pores along the [010] and [001]...