Pure and N-doped TiO2 nanoparticles for different dopant concentrations were synthesized by sol gel method. The samples were characterized for morphological and elemental analysis using Scanning Electron Microscope (SEM), and Energy Dispersive X-ray Spectroscopy (EDX), X-ray diffraction and Microraman spectroscopy and Optical properties by UV-Vis diffuse reflectance spectra. The Photocatalytic activity of the samples for methylene blue degradation was investigated under Xenon lamp and halogen lamp. 3N-doped TiO2 showed narrower band gap (2.98 eV) than undoped TiO2 (3.18 eV). As a result, it was observed that the photocatalytic activity of N-doped TiO2 nanoparticles was higher than that of undoped TiO2
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