Abstract: Nano TiO₂ was dip-coated on active air purification sieve of active carbon.The purification effect of this sieve against various polluting gases were investigated.The result showed that purification effects on H₂S, NH₃, HCHO, CO, and toluene were notably enhanced throush degradation of pollutants by photocatalysis agent under UV irradiation, which resulted in enhanced purification ability of active carbon. The adsorption effect of active carbon provided a high-concentration environment to increase the reaction rate.

Key words: photocatalysis, nano-titanium dioxide, active carbon, air purification