Influence of Ultraviolet Light on Photocatalytic TiO2 Materials

gases affect the diurnal rise and fall of tropospheric ozone. By removing gases through the use of titanium dioxide () photocatalytic materials, tropospheric ozone concentrations could be reduced. Recent developments related to the photocatalytic pollution reduction capabilities of have led a movement to understand the material properties required to create construction materials which have the potential to reduce air pollutants. A research program was undertaken to isolate variables that impact the kinetics of reaction. Six materials were tested for removal efficiencies. The productive materials were then tested at multiple concentrations to determine the effect of ultraviolet (UV) irradiance on their efficiency to reduce air pollutants. It was found that specific anatase phases manufactured and sized to have high levels of photocatalytic activity could reduce air pollutants at high efficiencies. The removal efficiency was 2.4times higher at a UV irradiance of than at , equivalent to a sunny or shady surface, respectively.