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Synthesis of Nitrogen-Rich Carbon Nitride Networks from an Energetic Molecular Azide Precursor

Gillan, Edward G

Chemistry of materials, 2000-12, Vol.12 (12), p.3906-3912 [Periódico revisado por pares]

Washington, DC: American Chemical Society

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  • Título:
    Synthesis of Nitrogen-Rich Carbon Nitride Networks from an Energetic Molecular Azide Precursor
  • Autor: Gillan, Edward G
  • Assuntos: Applied sciences ; Building materials. Ceramics. Glasses ; Ceramic industries ; Chemical industry and chemicals ; Chemistry ; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...) ; Exact sciences and technology ; Inorganic chemistry and origins of life ; Miscellaneous ; Preparations and properties ; Technical ceramics
  • É parte de: Chemistry of materials, 2000-12, Vol.12 (12), p.3906-3912
  • Notas: ark:/67375/TPS-MV4HN1DX-X
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  • Descrição: Nitrogen-rich carbon nitrides are produced as amorphous, bulk solids from the slow thermal decomposition of 2,4,6-triazido-1,3,5-triazine [(C3N3)(N3)3]. This energetic molecular azide is thermally unstable and readily decomposes at 185 °C in a high-pressure reactor to produce carbon nitride materials, e.g., C3N4. Under applied nitrogen gas pressure, (C3N3)(N3)3 decomposes to yield a solid with one of the highest reported nitrogen-to-carbon ratios corresponding to C3N5. This azide precursor also decomposes upon rapid heating to 200 °C to form graphite nanoparticles without any retained nitrogen. Spectroscopic evidence (infrared, nuclear magnetic resonance, and ultraviolet−visible) demonstrates that the carbon−nitrogen solids have significant sp2 carbon bonding in a conjugated doubly bonded network. Electron microscopy reveals that these powders have a glassy microstructure with large irregular pores and voids. C3N4 and C3N5 are thermally stable up to 600 °C and sublime to produce carbon nitride thin films on SiO2 and Si substrates. A discussion on possible azide decomposition pathways and carbon nitride structures is presented.
  • Editor: Washington, DC: American Chemical Society
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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