Production and evaluation of submicron titanium dioxide powders for photocatalytic degradation of organics in wastewater treatment

The production and evaluation of submicro titanium dioxide powders for photocatalytic degradation in wastewater treatment were described in this paper. Ultrafine titania powders were produced by the vapour phase hydrolysis of TTIP. The photoactivity of the powders was evaluated using phenol as a model pollutant. The effects of production and calcination conditions on photoactivity were investigated. It was found that production temperature, residence time, H2O to TTIP mole ratio, and calcination temperature influenced the properties of powders produced. Typically, titania powders with a large surface area, produced at high temperatures had the higher photoactivities