Dispersion Behavior of Nano-titania Powder in Aqueous Solution

The factors that influence the dispersion behavior of nano-titania in aqueous solution were investigated by spectrophotometry. By ultrasonic treatment for 10 min, nano-titania can be dispersed well and stably in aqueous solution when Na2SiO3 used as dispersant (0.8% of TiO2 in mass) and pH 8~10. The measured zeta potential of the particles in aqueous solution has confirmed the effect of pH on dispersion behavior.