Photocatalytic degradation of organochlorine compounds using TiO_2 supported on fiberglass cloth

摘要

The feasibility of photocatalytic degradation of organochlorine compounds using TiO-2 supported on fiberglass cloth as a photocatalyst was studied. The results showed that 2.0 X 10~-4 mol/dm~3 of dichloroethylene, trichloroethylene and tetrachloroethylene can be completely photocatalytically degraded within a short time under illumination with a 375W medium pressure mercury lamp. The effects of parameters such as illumination time, initial concentration of organochlorine compounds, amount of air flow and concentration of H_2O_2 on the photocatalytic degradation were investigated. The TiO_2 supported on the fiberglass was not easily detached and after 500h illumination there was no significant loss of photocatalytic activity of TiO_2. The passible mechanisms of photocatalytic degradation were discussed.