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Mesoporous Al 2 O 3 by Nanocasting: Relationship between Crystallinity and Mesoscopic Order
Author(s) -
Haffer Stefanie,
Weinberger Christian,
Tiemann Michael
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200131
Subject(s) - crystallinity , mesoporous material , mesoscopic physics , chemistry , chemical engineering , porosity , hydroxide , ammonia borane , aluminium , nanotechnology , inorganic chemistry , materials science , crystallography , catalysis , organic chemistry , physics , quantum mechanics , engineering , hydrogen production
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.