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  Pavlova-Verevkina, O.; Ozerina, L.; Chemseddine, A.; Ozerin, A.: Slow aggregation and disaggregation of TiO₂ nanocrystals in aqueous HCl solutions. Journal of Sol Gel Science and Technology 63 (2012), p. 162–167

10.1007/s10971-012-2781-z

Abstract:
The kinetics of slow aggregation and disaggregation of the plate-shaped TiO2 nanocrystals in aqueous HCl solutions at room temperature was studied using turbidimetry and small-angle X-ray scattering. The rate of slow aggregation of the diluted TiO2 hydrosols with 0.3 B pH B 3 was compared. The sols with pH about 1 were the most stable and the aggregation rate increased at the decrease of pH from 1 to 0.3 and at the increase of pH from 1 to 3. The reversible loose aggregates slowly formed at the low pH, while the more stable aggregates grew at higher pH.