In the paper, tetranbutyl titanate was loaded on granular active carbon using sol-gel dip-coating technique to form anatase nano-TiO photocatalyst with an average diameter of 16nm doped with N, Fe, Zn ions. The morphology and crystal structure were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and UV-Vis spectrophotometer, respectively.The results show that the prepared photocatalyst demonstrates outstanding photodegradation efficiency. Moreover, considering methylene blue (MB) as target degradation pollutant, under visible light irradiation, the photodegradation rate reached beyond 100% after 1h. © (2012) Trans Tech Publications, Switzerland.