4.6 Article

Preparation and characterization of graphitic carbon nitride through pyrolysis of melamine

Journal

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 94, Issue 2, Pages 387-392

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s00339-008-4816-4

Keywords

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Funding

  1. Natural Science Foundation of China [10304005, 50372023, 50334030]
  2. National Basic Research Program of China [2005CB724400, 2001CB711201]
  3. Research Fund for the Doctoral Program of Higher Education of China [20070183175]

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Graphitic carbon nitride (g-C3N4) has been synthesized via a two-step pyrolysis of melamine (C3H6N6) at 800 degrees C for 2 h under vacuum conditions. X-ray diffraction (XRD) patterns strongly indicate that the synthesized sample is g-C3N4. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) morphologies indicate that the product is mainly composed of graphitic carbon nitride. The stoichiometric ratio of C:N is determined to be 0.72 by elemental analysis (EA). Chemical bonding of the sample has been investigated by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Electron energy loss spectroscopy (EELS) verifies the bonding state between carbon and nitrogen atoms. Optical properties of the g-C3N4 were investigated by PL (photoluminescence) measurements and UV-Vis (ultraviolet-visible) absorption spectra. We suppose its luminescent properties may have potential application as component of optical nanoscale devices. Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) were also performed.

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