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Zr K-edge XAS study on ZrO2-pillared aluminosilicate

Title
Zr K-edge XAS study on ZrO2-pillared aluminosilicate
Authors
Jung H.Paek S.-M.Yoon J.-B.Choy J.-H.
Ewha Authors
최진호
SCOPUS Author ID
최진호scopus
Issue Date
2007
Journal Title
Journal of Porous Materials
ISSN
1380-2224JCR Link
Citation
vol. 14, no. 4, pp. 369 - 377
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The ZrO2-pillared clay with high acidic property has been prepared by reacting 1 wt% colloidal suspension of Na+- montmorillonite with 1 N aqueous solution of ZrOCl2•8H 2O and by subsequent heating. The evolution of local structure around zirconium of the intercalant stabilized in-between aluminosilicate layers upon intercalating, drying, and pillaring condition has been systematically studied by X-ray absorption spectroscopy, and compared to those of reference compounds such as ZrO2, and ZrOCl2 • 8H2O and its 1 N aqueous solution. The intercalated zirconium species was identified as the Zr-tetramer, [Zr4(OH)14(H2O)10] 2+, with an average molecular volume of 10 × 10 Å2 and a thickness of 4.5 Å. Also it becomes more condensed upon drying and eventually transforms to a zirconium oxide pillar upon calcination. © 2007 Springer Science+Business Media, LLC.
DOI
10.1007/s10934-006-9002-5
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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