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Low-Temperature Synthesis of Mesoporous Titania-Silica Films with Pre-Formed Anatase Nanocrystals
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SYSNO ASEP 0331615 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Low-Temperature Synthesis of Mesoporous Titania-Silica Films with Pre-Formed Anatase Nanocrystals Title Nízkoteplotní syntéza mesoporézních filmů SiO2-TiO2 z předem vytvořených anatasových nanokrystalů Author(s) Fattakhova Rohlfing, D. (DE)
Szeifert, J. M. (DE)
Yu, Q. (DE)
Kalousek, Vít (UFCH-W)
Rathouský, Jiří (UFCH-W) RID, ORCID
Bein, T. (DE)Source Title Chemistry of Materials. - : American Chemical Society - ISSN 0897-4756
Roč. 21, č. 12 (2009), s. 2410-2417Number of pages 8 s. Language eng - English Country US - United States Keywords supported TiO2 catalysis ; metal-oxide nanoparticles ; sol-gel process Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA104/08/0435 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000267049200011 DOI 10.1021/cm803494u Annotation Titania-silica composite films with a high content of crystalline titania phase and periodic mesoporous structure were fabricated by a low temperature "brick and mortar" approach. Pre-formed titania nanocrystals were fused with surfactant-templated sol-gel silica, which acts as a structure-directing matrix and as a chemical glue. The nature of the surfactant plays the decisive role in the mesostructure formation. Using Pluronic P123 as the structure-directing agent, the structure formation of the mesoporous silica is greatly disturbed as a result of the presence of titania nanoparticles. On the contrary, the use of Pluronic F127, whose molecules are larger and whose poly(ethylene oxide) blocks are more hydrophilic, enables the preparation of composite titania-silica mesoporous architectures that can accommodate up to 50 wt % of nanocrystals and yet retain the periodicity of the porous structure. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2010
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