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Trivalent atom contribution on solid-solid transformation of Ga 13 polycation intercalated clay into sodalite investigated by X-ray absorption spectroscopy

Title
Trivalent atom contribution on solid-solid transformation of Ga 13 polycation intercalated clay into sodalite investigated by X-ray absorption spectroscopy
Authors
Lee S.-R.Park M.Han Y.-S.Hwang S.-H.Choy J.-H.
Ewha Authors
최진호
SCOPUS Author ID
최진호scopus
Issue Date
2005
Journal Title
Journal of Physical Chemistry B
ISSN
1520-6106JCR Link
Citation
Journal of Physical Chemistry B vol. 109, no. 19, pp. 9432 - 9436
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Solid-solid transformation mechanism of Ga Keggin-type ion intercalated clay into sodalite has been clarified by X-ray diffraction (XRD), FT-IR spectroscopy, and X-rayabsorption spectroscopy (XAS). To follow the structural evolution precisely by XANES and EXAFS, the XAS active element containing polycation [Ga13O4-(OH)24(H2O) 12]7+ was intercalated into montmorillonite (MMT). FT-IR and XAS spectra confirm that the formation of sodalite framework is initiated by the delocalized rearrangement between silicate networks and collapsed interlayered Ga species, and is followed by the incorporation of Al in the octahedral sheet of clay (MMT). According to the XAS studies, it is found that the formation of Ga(Al)-O-Si species is strongly influenced by the trivalent cations, which are rapidly changed in the environment, followed by reaction with the silicate network of clay during the solid-solid transformation. © 2005 American Chemical Society.
DOI
10.1021/jp050011k
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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