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Fluoride‐Induced Hierarchical Ordering of Mesoporous Silica in Aqueous Acid‐Syntheses
Author(s) -
SchmidtWinkel Patrick,
Yang Peidong,
Margolese David I.,
Chmelka Bradley F.,
Stucky Galen D.
Publication year - 1999
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199903)11:4<303::aid-adma303>3.0.co;2-m
Subject(s) - materials science , aqueous solution , mesoporous material , fluoride , mesoporous silica , nanotechnology , chemical engineering , inorganic chemistry , organic chemistry , catalysis , chemistry , engineering
Hierarchical ordering of mesoporous silica induced by fluoride addition is described for aqueous acid‐syntheses. The authors report that small amounts of fluoride make it possible to control the organization of the mesoporous materials on different length scales. At low pH, fluoride addition brings about the formation of large hydrothermally stable silica rods (see Figure) consisting of aligned bundles of mesoporous silica fibers.