期刊
CERAMICS INTERNATIONAL
卷 39, 期 2, 页码 1195-1202出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.07.044
关键词
Powders: chemical preparation; Grain growth; Electron microscopy; TiO2 anatase
资金
- Spanish Ministry of Science and Innovation (MICINN) [IPT-120000-2010-033, IPT-2011-1113-310000, CICYTMAT 2010-16614]
TiO2 nanoparticles with tailored morphology have been synthesized under exceptionally soft conditions. The strategy is based on the use of a non-aqueous alcoholic reaction medium in which water traces, coming either from the air,(atmospheric water) or from an ethanol water azeotropic mixture (ethanol 96%), are incorporated in order to accelerate hydrolysis of the Ti-precursor. Moreover, organic surfactants have been used as capping agents so as to tailor crystal growth in certain preferential directions. Combinations of oleic acid and oleylamine, which lead to the formation of another surfactant, dioleamide, are employed instead of fluorine-based compounds, thus increasing the sustainability of the process. As a result, TiO2 nanostructured hierarchical microspheres and individual nanoparticles with exposed high-energy facets can be obtained at atmospheric pressure and temperatures as low as 78 degrees C. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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