Abstract
Transmission electron microscopy has been used to study the morphology and topography of carbon deposits (films) on the surface of silica gels. Complex carbon-silica adsorbents were obtained by pyrolysis of n-heptyl alcohol, benzyl alcohol and α-phenylethyl alcohol on the surface of silica gel and also by pyrolysis of other compounds (i.e. acenaphthene, p-chlorotoluene) and by pyrolysis of mixtures of the above compounds. We have found distinct correlations between the morphology of carbon deposit (microscopic image of the carbon layer) and the composition of the carbonized matter, and surface properties of the composed adsorbent, i.e. heat of adsorption, the adsorption shape of the energy distribution function, selectivity in chromatography and the like. The adsorption shape of the potential distribution function also correlates with the replicas of the complex adsorbent surface.
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