Nanocrystalline hexaaluminate-type mixed oxides having crystallite sizes of around 20 nm and high surface areas (>77 m2 g−1) were synthesized using an original mechanosynthesis technique. These nanocrystalline materials were evidenced to be highly active heterogeneous catalysts compared to the conventional parent materials.
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Laassiri et al. (2011) studied this question.
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