English, Article edition: MECHANISM OF SILICA NANO-PLATE FORMATION FROM LUCENTITE N. H. TRAN; M. A. WILSON; A. S. MILEV; ...

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Physical Description
  • article
Language
  • English

Edition details

Title
  • MECHANISM OF SILICA NANO-PLATE FORMATION FROM LUCENTITE
Author
  • N. H. TRAN
  • M. A. WILSON
  • A. S. MILEV
  • G. R. DENNIS
  • G. S. K. KANNANGARA
Physical Description
  • article
Notes
  • The mechanism of formation of silica nano-plates by exfoliation of a phyllosilicate magnesium containing clay, Lucentite, in an aqueous solution of poly(acrylic acid) has been studied. Fourier transform infrared spectroscopy and Mg K-edge near edge X-ray adsorption fine structure (NEXAFS) analysis shows that non-surface (bulk) Mg ions were not chemically involved in the poly(acrylic acid)/​clay intercalation, but were substantially involved in the exfoliation resulting in the silica nano-plates. During intercalation, O K-edge NEXAFS shows that surface defects were formed which represent additional structural branches on the surface. During exfoliation, these increased significantly. Si L3,2-edge NEXAFS measurements shows that this occurred by migration of SiO4 groups within the exfoliated silica plates.
  • Phyllosilicate clay, Lucentite, silica nano-plate, intercalation, exfoliation, Fourier transform infrared spectroscopy, near edge X-ray adsorption fine structure
  • RePEc:wsi:srlxxx:v:14:y:2007:i:02:p:235-239
Language
  • English
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