The agglomeration control of alkoxide derived TiO₂-SiO₂ hybrid nano-particle

Abstract

This paper describes the effects of the drying conditions of titania-silica (TiO₂-SiO₂) sol on the dispersibility of the hybrid particles. The hybrid sol of SiO₂ nano-particles coated with TiO₂ was prepared by a sol-gel process with controlled chemical modification (CCM). The effects of the initial pressure of supercritical drying (SCD) and the zeta potential in the sol on the dispersibility of the particles were investigated to obtain the well-dispersed TiO₂-SiO₂ hybrid particles. As a result, well-dispersed TiO₂-SiO₂ hybrid particles were successfully prepared by controlling the initial pressure of SCD and/or the zeta potential.