Effective Route to Graphitic Carbon Nitride from Ball-MilledAmorphous Carbon in NH₃ Atmosphere Under Annealing

Graphitic carbon nitride (g-C₃N₄) powders were successfully synthesized from ball-milled amorphous carbon under NH₃ atmosphere at high temperature, for the first time to our knowledge. The combined characteristic data obtained by x-ray diffraction, high-resolution transmission electron microscopy, electron energy loss spectroscopy, Raman spectroscopy, energy dispersive spectroscopic analysis, and Fourier transformation infrared spectroscopy provide substantial evidence for the graphite-like sp²-bonded structure with C₃N₄ stoichiometry.