Neutron scattering studies of the structure and mechanisms of adsorption in porous oxide gels

The mechanism of the adsorption and condensation of benzene at 310 K in two mesoporous silica gels with different pore structure was investigated by SANS. Measurements have been made in situ during an adsorption/desorption isotherm cycle with a specially constructed cell using contrast matching cond...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1998-04, Vol.225 (1-3), p.200-204
Main Authors: Ramsay, John D.F, Hoinkis, Ernst
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Neutron scattering
Porous oxide gels
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Summary:The mechanism of the adsorption and condensation of benzene at 310 K in two mesoporous silica gels with different pore structure was investigated by SANS. Measurements have been made in situ during an adsorption/desorption isotherm cycle with a specially constructed cell using contrast matching conditions for the condensed fluid. Results are in accord with a process of multilayer formation and subsequent capillary condensation, which develops around the zones of particle contact in the gel structure.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(98)00041-6