Wavelength Dependence of the Photocatalytic Performance of Pure and Doped TiO2 Photocatalysts—A Reflection on the Importance of UV Excitability

The photocatalytic performances of doped and non-doped TiO2 photocatalysts (TiO2-s) were compared under solar various types artificial irradiation using phenol as a model contaminant. Non-doped (mainly anatase phase) TiO2-s had significantly higher efficiency than highly visible-light-active natural irradiation. To explain these unexpected results, we measured the wavelength dependence at six different ranges (λ = 300–650 nm). For this purpose, UV fluorescence tubes five LED lights colors (violet, blue, green, yellow, red) used to activate photocatalysts. photon fluxes measured, apparent quantum yields calculated for all conditions. highest yield was 1.43% our own (prepared via flame hydrolysis) However, lower (by 1–2 orders magnitude) in visible range, even most TiO2.