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Sedimentation Properties of TiO2 Nanoparticles in Organic Solvents

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Abstract:

In this study, the colloidal stability and sedimentation behavior of crystalline TiO2 particles (∼300nm) in various organic solvents have been investigated by means of a backscattered light flux profile (Turbiscan) and a zeta potential measurement. The backscattered light flux profiles revealed that the TiO2 nanoparticles were readily sedimented in water, methyl alcohol, and ethyl alcohol due to a flocculation-induced particle growth, while a particle coalescence and a sedimentation of the TiO2 nanoparticles were hardly observed in isopropyl alcohol. The measured ζ potentials verified the differences of the colloidal stabilities of the TiO2 particles in the organic solvents, showing a good correlation with the migration velocity.

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Periodical:

Solid State Phenomena (Volume 119)

Pages:

267-270

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.119.267

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Online since:

January 2007

Authors:

S.H. Woo, Min Ku Lee, Chang Kyu Rhee

Keywords:

Colloidal Stability, Organic Solvent, Sedimentation, Titania (TiO2), turbiscan, Zeta-Potential

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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