Abstract
Nano TiO<sub>2</sub> was synthesized by hydrothermal method. The sample was modified by doping transition metal ion (V, Cr and Fe) and non metal (N). Doped TiO<sub>2</sub> samples were characterized by XRD (X-ray diffraction), FE-SEM (Fieldemission scanning electron microscopy) and UV-Vis (UV-Vis diffuse reflectance spectroscopy). Photocatalytic activity in mineralization of xylene (vapor phase), methylene blue and active dyer PR (liquid phase) were tested. In comparison to non-doped TiO<sub>2</sub>, V-,Cr-,Fe-doped TiO<sub>2</sub> and N-doped TiO<sub>2</sub> samples exhibited much higher photocatalytic activity using visible light instead of UV.
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