By the surface treatment of crystallized TiO2 particle used hydrogen peroxide and sulfuric acid in an aqueous suspension and heat treatment improve the photocatalytic activity of crystallized TiO2 particles was improved compared with that of untreated crystallized TiO2 particles. The effect of surface treatment on photocatalytic behavior of rutile TiO2 particles was much higher than that of anatase TiO2 particles.
