Reaction Kinetics and Catalysis Letters

, Volume 50, Issue 1–2, pp 227–233 | Cite as

Positron spectroscopy of rehydrated pyrogeneous silica surface

  • V. T. Adonkin
  • V. V. Dyakin
  • V. M. Ogenko
  • A. A. Chuiko
Poster Presentations

Abstract

Positron annihilation method has been used for investigating amorphous nonporous pyrogeneous silica of high purity. The influence of water adsorption on the structure of the silanol surface is shown. The effect of “swelling”, that is an increase of interglobular free volume at intermediate degrees of silica hydration has been observed.

Keywords

Spectroscopy Physical Chemistry Hydration Catalysis High Purity 

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References

  1. 1.
    V.M. Ogenko, V.G. Ivashechkin, A.A. Chuiko, I.F. Mironuk: Teor. Eksp. Khim.,23, 745 (1985).Google Scholar
  2. 2.
    R.H. Doremus: J. Phys. Chem.,75, 3147 (1971).Google Scholar

Copyright information

© Akadémiai Kiadó 1993

Authors and Affiliations

  • V. T. Adonkin
    • 1
  • V. V. Dyakin
    • 1
  • V. M. Ogenko
    • 1
  • A. A. Chuiko
    • 1
  1. 1.Institute of Surface ChemistryUkrainian Academy of SciencesKievUkraine

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