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

Man Sig Lee; Ju Dong Lee; Hong Dae Kim; Seong Soo Hong

doi:10.4028/www.scientific.net/MSF.695.602

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HomeMaterials Science ForumMaterials Science Forum Vol. 695Synthesis of Nanosized TiO2-SiO2 Particles in...

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

Abstract:

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:

Materials Science Forum (Volume 695)

Pages:

602-605

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.695.602

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Online since:

July 2011

Authors:

Man Sig Lee, Ju Dong Lee, Hong Dae Kim, Seong Soo Hong

Keywords:

Anionic Surfactants, Microemulsion, Nanosized TiO₂-SiO₂ Particles, Reverse Micelle

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