Removal of air pollutants by photocatalysis with ozone in a continuous-flow reactor

摘要

Photocatalysis was combined with O3 (O3-PCO) for better destruction performance of formaldehyde and toluene. The mechanism of enhanced performance and improved stability in the O3-PCO process under different operating conditions was studied. O3 improved remarkably the removal efficiency of formaldehyde and toluene with increased photocatalyst durability. The O3-PCO process displayed excellent stability during the variation of humidity and initial O3 concentration. O3-PCO process has enhanced performance because it comprises more sub-processes, e.g., UV/O3 and O3/TiO2, for destroying pollutants than the PCO process alone does.