Pyrolysis Synthesized g‐C 3 N 4 for Photocatalytic Degradation of Methylene Blue

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Graphitic carbon nitride (g‐C 3 N 4 ) was synthesized at 520°C by the pyrolysis of cyanamide, dicyandiamide, and melamine. The samples were characterized by X–ray diffraction (XRD), UV‐visible diffuse reflectance spectra, Fourier transform infrared spectroscopy (FT‐IR), and elemental analyzer. The photocatalytic activity of g‐C 3 N 4 was evaluated by the photodegrading experiments of methylene blue (MB). The results indicated that g‐C 3 N 4 . A photocatalytic mechanism presumed the MB photodegradation over the C 3 N 4 photocatalyst is attributed to photogenerated electron impelled multistep reduction of O 2 .