ABSTRACT
Much attention has been paid to photocatalytic oxidation in the field of air and water purification. Photocatalytic oxidation employs semiconductors such as TiO2, ZnO as a photocatalyst in ultraviolet radiation. Several factors which affect photocatalytic decomposition were discussed in the present paper. Photocatalytic oxidation technique is applicable for the elimination of gas-phase contamination in air.
ABSTRACT
The paper reviews the basic mechanism of photocatalytic oxidation, the kinds of photocatalyst, the characteristics of TiO2 and the commonly used carriers of TiO 2 photocatalytic oxidation in water treatment, the degradation of organic pollutants in water by photocatalytic oxidation and the applications of this new technique in tap water purification. The photocatalytic oxidation as a new technique of environmental protection is being much con-cerned widely.