Abstract
Abstract Nitrogen-doped TiO 2 nanomaterials were fabricated from hydrogen titanate prepared by hydrothermal method. The starting materials with difference nitrogen sources and concentration were studied. The samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), BET surface area, Fourier Transform infrared spectrometer (FT-IR) and UV-vis absorption spectra by UV–VIS spectroscopy. The photocatalytic activity was investigated by degradation of methylene blue aquoeus solution under visible light irradiation. The highest photocatalytic activity of nitrogen-doped TiO 2 was gotten from the sample in which 0.5 M guanidine carbonate was used as nitrogen source. Compared with pure TiO 2 (from hydrothermal method) and P25-Degussa, the wavelength range of nitrogen-doped TiO 2 was shifted to visible light while pure TiO 2 and P25-Degussa were showed in ultraviolet region.
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