Efficient TiO2 Powder and Film Photocatalysts with Rutile Crystal Structure

Efficient TiO2 powder and film photocatalysts with the rutile structure were prepared. Their photocatalytic properties were assessed by measuring the photooxidative decomposition of gaseous acetaldehyde. The rutile powder showed much higher photoactivity than Degussa P-25 powder, both in degradation rate and in quantum efficiency. Moreover, the rutile film prepared by sintering the rutile sol at 450 °C also showed rather high photocatalytic activity.