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A titanium chloromethoxide solution was prepared by reacting TiCl4 with methanol, followed by water addition. The starting solutions were characterized by Fourier Transform Infrared (FTIR) spectroscopy, evidencing that the in situ generated water results in early hydrolysis of the chloroalkoxide. The solution was reacted with molten dodecylamine at room temperature, obtaining a white slurry of amorphous titania nanoparticles. Stable, redispersible TiO2 nanocrystals could be prepared by subsequent solvothermal treatment in oleic acid at 250 °C. The use of oleic acid was essential for obtaining crystalline structures, while other surfactants prevented crystallization. The nanocrystals were characterized by X-ray Diffraction and Transmission Electron Microscopy, confirming the formation of anatase TiO2 nanocrystals with a mean size of 3.3 nm. The TiO2 nanocrystals were used for fabricating gas-sensing …
Springer US
Publication date: 
1 Dec 2011

Mauro Epifani, Elisabetta Comini, Guido Faglia, Jordi Arbiol, Teresa Andreu, Giovanni Pace, Pietro Siciliano, Joan R Morante

Biblio References: 
Volume: 60 Issue: 3 Pages: 254-259
Journal of sol-gel science and technology