Iron modified TiO₂ was prepared by the sol-gel method and surface modification method followed by calcination at 400°C. Two types of titanium dioxide: TiO₂ ST-01(Ishihara Sangyo Ltd., Japan; 300 m²/g), and TiO2 P25 (Evonik, Germany, 50 m²/g) were used in the grinding procedure. The photocatalysts were characterized by UV-VIS absorption and BET surface area measurements. The photocatalytic activity of the obtained powders in UV-Vis and visible light was estimated by measuring the decomposition rate of phenol (0.21 mmol/dm³) in an aqueous solution. The best photoactivity under visible light was observed for iron doped TiO₂ with 0.5% by grinding the TiO₂ ST-01.