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N-doped TiO_2(N-TiO_2) nanoparticles were synthesized via a one-step low temperature(180 C)solvothermal route,which adopted NH_4NO_3 as the nitrogen source.The structure,composition,BET specific surface area,and optical properties of the as-synthesized product were characterized by X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy,N_2 adsorptiondesorption isotherms,and UV-vis diffuse reflectance spectroscopy.In addition,its photocataiytic properties were tested by the reduction of aqueous Cr(Ⅵ) under UV and visible light(x>420 nm)irradiation.It was observed that for the reduction of aqueous Cr(Ⅵ),the as-synthesized N-TiO_2nanoparticles not only exhibited much higher photocataiytic activity than P25 TiO_2 under UV light,but also exhibited remarkably high photocataiytic activity under visible light(λ> 420 nm).
N-doped TiO_2 (N-TiO_2) nanoparticles were synthesized via a one-step low temperature (180 C) solvothermal route, which adopted NH_4NO_3 as the nitrogen source.The structure, composition, BET specific surface area, and optical properties of the as -synthesized product were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, N 2 adsorption desorption isotherms, and UV-vis diffuse reflectance spectroscopy. In addition, its photocataliytic properties were tested by the reduction of aqueous Cr (VI) under UV and visible light (x> 420 nm) irradiation. It was observed that for the reduction of aqueous Cr (VI), the as-synthesized N-TiO 2 nanoparticles not only showed much higher photocataiytic activity than P25 TiO 2 under UV light, but also indicated remarkably high photocataiytic activity under visible light (λ> 420 nm).