Crystalline, mesoporous alumina (Al 2 O 3 ) materials with specific surface areas up to 400 m 2 g –1 have been synthesized by means of structure replication (nanocasting) using CMK‐8 carbon as a structure matrix. A crucial step during this synthesis procedure is the conversion of aluminum nitrate into aluminum hydroxide by treatment with ammonia vapor. The impact of this step was investigated in some detail. Prolonged vapor treatment has a positive impact on the crystallinity of the final Al 2 O 3 products but at the same time leads to loss of mesoscopic structural order and porosity.
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Haffer et al. (2012) studied this question.
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