Title

Surface Structure and Chemistry of High Surface Area Silica Gels

Abstract

Combined Raman and 29Si NMR investigations of high surface area silica gels indicate that dehydroxylation of the a-SiO2 surface results preferentially in the formation of cyclic trisiloxanes (3-membered rings). Estimates of the maximum experimentally observed concentration of 3-membered rings correspond to a surface coverage of about 28-58%. Two consequences of 3-membered rings on the a-SiO2 surface are enhanced hydrolysis rates and increased skeletal densities. © 1990.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1990 Elsevier, All rights reserved.


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