Synthesis of high crystalline carbon-nitrogen layered compounds by CVD using nickel and cobalt catalysts
Identifieur interne : 000D91 ( Main/Exploration ); précédent : 000D90; suivant : 000D92Synthesis of high crystalline carbon-nitrogen layered compounds by CVD using nickel and cobalt catalysts
Auteurs : T. Nakajima [Japon] ; M. Koh [Japon]Source :
- Carbon [ 0008-6223 ] ; 1997.
English descriptors
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Abstract
Carbon-nitrogen layered compounds, CxNs, have been synthesized by thermal decomposition (CVD) of acetonitrile and pyridine with nickel or cobalt catalyst at 800–1200 °C. Acetonitrile yielded C14NC62N at 800–1100 °C and pyridine gave C25NC60N containing less nitrogens at 800–1000 °C. The nitrogen concentrations were the highest in the products, C14NC16N prepared from acetonitrile in the temperature range, 850–1000 °C. X-ray diffraction patterns indicate that the CxN samples have the same layered structures as usual carbon materials. The use of nickel or cobalt catalyst highly improves the crystallinity of CxN samples, and increases the nitrogen atoms incorporated in graphene layers compared with the pyridine type nitrogens existing at the edge of graphene layers. No distinct difference was found in the compositions and crystallinity of CxNs prepared with two kinds of catalysts, nickel and cobalt.
Url:
DOI: 10.1016/S0008-6223(96)00143-1
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