the photocatalytic activity of un-doped and Fe, Co, Ni doped TiO2 in degradation of NB from aqueous solution (2.52*10-4 M) was investigated. The dopant concentrations, reported to TiO2 were 0.5,1,2 and 5wt.% All experiments were performed at pH = 7, with 100 mg/L catalyst dose and irradiation time between 30 and 240 min. The efficiency of pollutant dagradation was assessed by determination of NB concentration vs.