Factors Influencing the Photocatalytic Efficiency in the Experimental for the TiO_2 Powder Slurry Systems

摘要

The photocatalytic efficiencies of three commercially available TiO_2 samples were evaluated and compared for TiO_2 powder dispersed system with respect to pH and the water to be used for the perpetration of TiO_2 slurry. All the TiO_2 samples of P-25, NT-C, NT-20 showed a significant dependence of the photocatalytic efficiency on pH and exhibited higher photocatalytic efficiency in the pH between 5 and 7. The water used for the preparation of the TiO_2 slurry also affected the photocatalytic efficiency of the TiO_2 samples presumably due to a few cation ions existing in the water. The photocatalytic properties of TiO_2 samples varied significantly depending on the key experimental conditions applied to the TiO_2 slurry.