Crystallization Behaviour of Nanostructured Hybrid SiO2-TiO2 Gel Glasses to Nanocomposites
The crystallization behaviour of hybrid SiO2-TiO2 nanocomposites derived from titanosiloxanes by sol–gel method has been investigated depending on the type of siloxane precursor and the pirolysis temperature. The resulting hybrid titanosiloxanes, crosslinked with trimethylsilil isocyanate (nitrogen-modified) or methyltrietoxisilane (carbon-modified), were pirolyzed in an inert atmosphere in the temperature range between 600 to 1100 °C in order to form C-(N)-Si-O-TiO2 nanocomposites. By means of XRD, FTIR, 29Si NMR, SEM, TEM and AFM investigations have been established that the transformation of the nanostructured SiO2-TiO2 hybrid materials into nanocomposites as well as the crystalline size depend on the titanium content and the type of cross-linking agents used in the synthesizes.
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Document Type: Research Article
Publication date: 2010-04-01
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