Photocatalytic decomposition of toluene by TiO₂ film as photocatalyst

This paper reports on the degradation of gaseous toluene by the photo-catalytic oxidation process. The photocatalyst, Ti_O2 film, was prepared by the sol-gel method and was coated on porous nickel. The photo-catalytic decomposition of toluene was carried out in a recirculating batch reactor. The factors that affect toluene decomposition were studied, including particle size of the catalyst, initial toluene concentration, flow rate of toluene in the reactor, relative humidity and reactive temperature. In addition, deactivation of the catalyst is also discussed. The experiment results showed that toluene can be decomposed effectively by the photo- catalytic oxidation process, and that toluene degradation obeys the first-order reaction.