... and concentration of or-ganics, pH, presence of inorganic ions), the concentration of oxygen in the reaction solution, the magnitude of the inten-sity and wavelength of the UV light, the desirable ... peroxide could increase the reaction rates or cause inhibition effects depending on its concentration in the reaction solution. The results of allthese studies suggest that the effect of hydrogen ... photogeneratedelectrons in the conduction band by oxygen reduction is the rate-controlling step in the photocatalytic mechanism[26,54]. Consequently, conditions that favor the removal of conduction band electrons...