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Ultrasmall Titania Nanocrystals and Their Direct Assembly into Mesoporous Structures Showing Fast Lithium Insertion
- 1.0348372 - ÚFCH JH 2011 RIV US eng J - Journal Article
Szeifert, J. M. - Feckl, J. M. - Fattakhova-Rohlfing, D. - Liu, Y. - Kalousek, Vít - Rathouský, Jiří - Bein, T.
Ultrasmall Titania Nanocrystals and Their Direct Assembly into Mesoporous Structures Showing Fast Lithium Insertion.
Journal of the American Chemical Society. Roč. 132, č. 36 (2010), s. 12605-12611. ISSN 0002-7863. E-ISSN 1520-5126
R&D Projects: GA ČR GA104/08/0435
Institutional research plan: CEZ:AV0Z40400503
Keywords : nanocrystals * mesoporous structures * TiCl4
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 9.019, year: 2010
Ultrasmall and highly soluble anatase nanoparticles were synthesized from TiCl4 using tert-butyl alcohol as a new reaction medium. This synthetic protocol widens the scope of nonaqueous sol-gel methods to TiO2 nanoparticles of around 3 nm with excellent dispersibility in ethanol and tert-butanol. Microwave heating was found to enhance the crystallinity of the nanoparticles and to drastically shorten the reaction time to less than 1 h at temperatures as low as 50 degrees C. The extremely small size of the nanoparticles and their dispersibility make it possible to use commercial Pluronic surfactants for evaporation-induced self-assembly of the nanoparticulate building blocks into periodic mesoporous structures. A solution of particles after synthesis can be directly used for preparation of mesoporous films without the need for particle separation. The mesoporous titania coatings fabricated using this one-pot procedure are crystalline and exhibit high surface areas of up to 300 m(2)/g.
Permanent Link: http://hdl.handle.net/11104/0188923
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