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Porous Silica‐Based Mixed Oxides with Basic Organic Sites
Author(s) -
Geserick Jasmin,
Meyer Sarah,
Puchberger Michael,
Pabisch Silvia,
Peterlik Herwig,
Bethge Ole,
Bertagnolli Emmerich,
Schubert Ulrich
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.201200088
Subject(s) - chemistry , porosity , benzene , mesoporous silica , x ray photoelectron spectroscopy , chemical engineering , mesoporous material , metal , condensation , hydrolysis , catalysis , porous medium , inorganic chemistry , heterogeneous catalysis , polymer chemistry , organic chemistry , physics , engineering , thermodynamics
Porous, organically modified silica‐based mixed oxides were prepared in a two‐step process. First, a mixture of tetraethoxysilane, bis(triethoxysilyl)dipropylamine and, optionally, 1,4‐bis(triethoxysilyl)benzene was treated with metal chlorides (ZrCl 4 , TiCl 4 , or AlCl 3 ), and no water or water‐based catalyst was added to the sols. After film formation, the materials were exposed to ambient humidity to achieve hydrolytic condensation of residual groups. Materials with wormhole‐like ordered porosity and uniform mesopores were obtained with metal proportions up to about 20 %. According to XPS measurements, the metals are homogenously distributed in the silica matrix.