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Fine Structures of Zeolites and Mesoporous Materials

Published online by Cambridge University Press:  02 July 2020

Osamu Terasaki ,
Tetsu Ohsuna ,
Mizue Kaneda ,
Yasuhiro Sakamoto ,
Kenji Hiraga ,
Anna Carlsson ,
Ryong Ryoo ,
Viveka Alfredsson  and
Michael W. Anderson
Osamu Terasaki
Affiliation:
Department of Physics, CIR and CREST, JST, Tohoku University, Sendai, Japan
Tetsu Ohsuna
Affiliation:
Institute for Materials Research, Tohoku University, Sendai, Japan
Mizue Kaneda
Affiliation:
Department of Physics, CIR and CREST, JST, Tohoku University, Sendai, Japan
Yasuhiro Sakamoto
Affiliation:
Department of Physics, CIR and CREST, JST, Tohoku University, Sendai, Japan
Kenji Hiraga
Affiliation:
Institute for Materials Research, Tohoku University, Sendai, Japan
Anna Carlsson
Affiliation:
Department of Physics, CIR and CREST, JST, Tohoku University, Sendai, Japan
Ryong Ryoo
Affiliation:
Department of Chemistry, KAIST, Taejon305-701Korea
Viveka Alfredsson
Affiliation:
Physical Chemistry 1, Chemical Centre, Lund University, Sweden
Michael W. Anderson
Affiliation:
Department of Chemistry, UMIST, P.O. Box 88, Manchester, M60 1QDUK
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Extract

Zeolites are crystalline aluminosilicates with frameworks built from corner-sharing TO4- tetrahedra(where T is Si or Al but can also be substituted with P, Ga, Ge, etc.) to produce channels or cavities of molecular dimensions. Owing to these characteristic features, zeolites have attracted much attention not only for catalytic applications but also as containers of confined materials. In most circumstances zeolites can only be synthesized as fine powders, ca. 1 μm, and the additional presence of defects or intergrowths makes structure solution difficult. HREM is therefore one of the most important tools for the investigation of such structures and the early work of Thomas and his group in Cambridge were dedicated to developing such techniques. The advantage of HREM has been subsequently demonstrated especially for characterizing and determining fine structures, e.g. (i) zeolite intergrowths structures such as ERI/OFF and FAU/EMT, (ii) enantiomeric intergrowths of structural units in ETS-10 and structural solution, (iii) surface structures and growth units and (iv) size of clusters and their registry with the framework structures.

Type
Sir John Meurig Thomas Symposium: Microscopy and Microanalysis in the Chemical Sciences
Information
Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 8 - 9
Copyright
Copyright © Microscopy Society of America

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