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(a) Photo-oxidation capability (b) hydroxyl radical generation during near-visible light irradiation to the TiO2 nanoparticles. Nanoparticles (100 ug/mL) were suspended in water in presence of indicator dyes followed by illumination for 10 mins. The rate of photo-oxidation, was measured in terms of N-acetyl-L-tryptophanamide (NATA) oxidation. * statistically significant from 0% Fe p≤ 0.05.
