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题名: Insights into the Topotactic Conversion Process from Layered Silicate RUB-36 to FER-type Zeolite by Layer Reassembly
作者: Zhao, Zhenchao1;  Zhang, Weiping2;  Ren, Pengju1;  Han, Xiuwen1;  Mueller, Ulrich3;  Yilmaz, Bilge4;  Feyen, Mathias3;  Gies, Hermann5;  Xiao, Feng-Shou6;  De Vos, Dirk7;  Tatsumi, Takashi8;  Bao, Xinhe1
关键词: topotactic conversion mechanism ;  layered zeolite precursor ;  RUB-36 ;  FER-type zeolite ;  layer reassembly
刊名: CHEMISTRY OF MATERIALS
发表日期: 2013-03-26
DOI: 10.1021/cm303131c
卷: 25, 期:6, 页:840-847
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Layered RUB-36 and PREFER (lamellar precursor of ferrierite) are the precursors of CDO and FER-type zeolites, respectively. Both are composed of the same ferrierite (FER) layer building blocks. Topotactic conversion from RUB-36 to pure silica zeolite ZSM-35 has been demonstrated in the presence of a surfactant cetyltrimethylammonium hydroxide (CTAOH). The transformation mechanism of this process was revealed, for the first time, by the detailed investigations of powder X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal analysis, and one- and two-dimensional (2-D) solid-state magic-angle spinning nuclear magnetic resonance (MAS NMR) as well as theoretical simulations. During swelling at room temperature, cetyltrimethylammonium cations (CTA(+)) replacing the original template were intercalated into FER layers to expand the interlayer distance remarkably and consequently to destroy the strong hydrogen-bonding interactions between the layers. 2-D H-1-Si-29 heteronuclear correlation (HETCOR) NMR indicates that the surfactant polar heads approximate the FER layers in swollen RUB-36. After deswelling, only a small amount of CTA(+) cations with long tails lay in the void space between the FER layers. The Monte Carlo simulations on the deswollen RUB-36 further elucidate the occlusion of CTA(+) cations in the pre-10 member ring of the layered ferrierite precursor, which may act as the structure-directing agent for the formation of FER-structured zeolite. The FER layer reassembly from the alteration of CTA(+) conformation at the interlayers is of key importance to the topotactic transformation of RUB-36 to FER-type zeolite by the dehydration-condensation reaction. This may open up more applications in the lamellar zeolite system by the layer restacking approach.
关键词[WOS]: SOLID-STATE NMR ;  STRUCTURE-DIRECTING AGENTS ;  FERRIERITE LAYERS ;  CRYSTAL-STRUCTURE ;  MOLECULAR-SIEVES ;  INTERLAYER EXPANSION ;  LAMELLAR PRECURSOR ;  IONIC LIQUIDS ;  MONTE-CARLO ;  TITANOSILICATE
语种: 英语
WOS记录号: WOS:000316847100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137569
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
3.BASF SE, Chem Res & Engn, D-67056 Ludwigshafen, Germany
4.BASF Corp, Chem Res & Engn, Iselin, NJ 08830 USA
5.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Bochum, Germany
6.Zhejiang Univ, Dept Chem, Hangzhou 310028, Peoples R China
7.Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, Louvain, Belgium
8.Tokyo Inst Technol, Chem Resources Lab, Yokohama, Kanagawa 227, Japan

Recommended Citation:
Zhao, Zhenchao,Zhang, Weiping,Ren, Pengju,et al. Insights into the Topotactic Conversion Process from Layered Silicate RUB-36 to FER-type Zeolite by Layer Reassembly[J]. CHEMISTRY OF MATERIALS,2013,25(6):840-847.
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