FOY, Denis; DEMAZEAU, Gérard; FLORIAN, Pierre; MASSIOT, Dominique; LABRUGÈRE, Christine; GOGLIO, Graziella

doi:10.1016/j.jssc.2008.10.018

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FOY, Denis
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DEMAZEAU, Gérard
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

FLORIAN, Pierre
Conditions Extrêmes et Matériaux : Haute Température et Irradiation [CEMHTI]

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Journal of Solid State Chemistry. 2009, vol. 182, n° 1, p. 165-171

Elsevier

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An hydrogenated nitrogen-rich graphitic carbon nitride, structurally related to the theoretical graphitic phase of C3N4, has been synthesized in a bulk well-crystallized form. This new material was prepared by thermal decomposition of thiosemicarbazide up to 600 °C at ambient pressure under nitrogen flow. Its composition was determined by elemental combustion analysis. Powder X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and C13 MAS NMR characterizations were performed. This material can be schematically described with a two-dimensional framework and a composition close to C3N4.17H1.12. In this nitrogen-rich material, C3N3 voids are fully occupied by water molecules which are strongly trapped into the material. A loss of crystallinity associated with a modification of the thermal behavior is observed when the amount of trapped molecules decreases in the graphitic material, order being damaged both between and in the graphitic planes.< Leer menos

Palabras clave en inglés

Carbon nitride

Graphitic materials

X-ray diffraction (XRD)

Nuclear magnetic resonance (NMR)

X-ray photoelectron spectroscopy (XPS)

Thermogravimetric analysis (TGA)

Triazine

Heptazine

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Modulation of the crystallinity of hydrogenated nitrogen-rich graphitic carbon nitrides

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