Innovative photocatalyst (FeOx–TiO2): transients induced by femtosecond laser pulse leading to bacterial inactivation under visible light

This study reports the photosensitizing effect/mechanism of FeOx under visible light irradiation and charge transfer to TiO2 on FeOx–TiO2 cosputtered film. The transients which were photo-induced by femtosecond laser pulses at 545 nm (25 fs) were identified, in addition to the concomitant bleaching bands at 400 nm). This observation unexpectedly confirms the role of FeOx absorbing light in the visible region. The important role of TiO2 is reported, leading to bacterial inactivation in the FeOx–TiO2 co-sputtered films.