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Slow Aggregation of Titania Nanocrystals in Acidic Hydrosols

Published online by Cambridge University Press:  07 July 2011

Olga Pavlova-Verevkina ,
Ludmila Ozerina ,
Natalia Golubko  and
Abdelkrim Chemseddine
Olga Pavlova-Verevkina
Affiliation:
Karpov Institute of Physical Chemistry, Obuha side street 3-1/12, building 6, 105064 Moscow, Russia
Ludmila Ozerina
Affiliation:
Karpov Institute of Physical Chemistry, Obuha side street 3-1/12, building 6, 105064 Moscow, Russia
Natalia Golubko
Affiliation:
Karpov Institute of Physical Chemistry, Obuha side street 3-1/12, building 6, 105064 Moscow, Russia
Abdelkrim Chemseddine
Affiliation:
Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
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Abstract

The kinetics of slow aggregation of monodisperse TiO2 nanocrystals in the acidic hydrosols at room temperature was studied for months by turbidimetry. The dependence of the initial rate of aggregation on the pH was calculated. The comparison of results obtained by turbidimetry and small angle X-ray scattering permits to suppose that very loose aggregates form at the low pH in HCl solution. The dependencies obtained in this work for room temperature can be taken into consideration at the tuning of TiO2 nanoparticles morphology through thermal treatment of hydrosols.

Keywords

sol-gelnanostructureoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1352: Symposium GG – Titanium Dioxide Nanomaterials , 2011 , mrss11-1352-gg11-01
Copyright
Copyright © Materials Research Society 2011

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References

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