Synthesis of Nanosized TiO2-SiO2 Particles in Microemulsions Stabilized by Anionic Surfactants

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Nanosized TiO2-SiO2 particles were prepared by controlled hydrolysis of titanium tetraisopropoxide (TTIP) and tetraethylorthosilicate (TEOS) in microemulsions stabilized by anionic surfactants. Anionic surfactants ammonium carboxylate perfluoropolyether (PFPE-NH4) and sodium bis (2-ethylhexyl) sulfosuccinate (AOT) were used for formation of stabilized microemulsions in the W/C and W/O systems, respectively. The physical properties of the prepared particles have been investigated by TG-DTA, FT-IR, XRD and HRTEM. It is shown that the XRD pattern of the TiO2-SiO2 particles dried at 105 °C without calcination indicates amorphous. The particles calcined at 500 °C were identified as nanocrystalline anatase regardless of TTIP/TEOS molar ratio. The crystallite size of prepared particles decreased with increasing the silica content. From FT-IR analysis, the band for Ti-O-Si vibration was observed. The micrographs of HRTEM shown that the TiO2-SiO2 nanoparticles have a spherical morphology with a narrow size distribution and then the lattice fringe was 3.5 Å, which corresponds to the lattice spacing of (101) plane in the anatase phase.

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Periodical:

Edited by:

Hyungsun Kim, Jian Feng Yang, Chuleol Hee Han, Somchai Thongtem and Soo Wohn Lee

Pages:

602-605

DOI:

10.4028/www.scientific.net/MSF.695.602

Citation:

M. S. Lee et al., "Synthesis of Nanosized TiO2-SiO2 Particles in Microemulsions Stabilized by Anionic Surfactants", Materials Science Forum, Vol. 695, pp. 602-605, 2011

Online since:

July 2011

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$35.00

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