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Structure of Sol-Gel Silic

Published online by Cambridge University Press:  22 February 2011

C. J. Brinker ,
R. K. Brow ,
D. R. Tallant  and
R. J. Kirkpatrick
C. J. Brinker
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185-5800
R. K. Brow
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185-5800
D. R. Tallant
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185-5800
R. J. Kirkpatrick
Affiliation:
University of Illinois, Dept. of Geology, Urbana, IL 61801
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Abstract

Combined Raman, 29Si NMR and reactivity studies of silica gels indicate that dehydroxylation of the silica surface results in cyclotrisiloxane species with reduced Si-O-Si bond angles and altered acid/base characteristics. XPS experiments indicate that the expected 0.35 eV shifts in Si2p and O1s binding energies due to the reduced bond angles are hidden within broad peaks due to the remaining hydroxyls. Additional Si2P, OlS, and ClS peaks are also observed and are postulated to result from preferential adsorption of extrinsic C-containing species on sites with enhanced acid/base properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 105: Symposium F – SiO2 and Its Interfaces , 1987 , 289
Copyright
Copyright © Materials Research Society 1988

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