Abstract
The power of a high energy ball milling process on the structure and at the surface of γ-Al2O3 was characterized in detail. Beside unexpected changes of BET surface areas and of the dissolution behaviour, the mechanochemical treatment strongly influences the adsorption of fluorine at the γ-Al2O3/ water interface. The time of the treatment has relevant importance on these processes. Since fluorine is not originally present in the bulk of γ-Al2O3, 19F MAS NMR studies allow to discriminate between different F-species adsorbed at the surface or present as metal fluoride particles in γ-Al2O3 powders after adsorption experiments.
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