Synthesis and characterization of nitrogen-functionalized graphene oxide in high-temperature and high-pressure ammonia

A novel and efficient approach to the synthesis of nitrogen-functionalized graphene oxide (GO) using aqueous ammonia, NH 3 (aq.), under high-temperature and high-pressure conditions was investigated. Nitrogen groups (N-groups) were incorporated in GO in different ways; by replacing the carbon (C) at...

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Veröffentlicht in:RSC advances 2016-01, Vol.6 (115), p.113924-113932
Hauptverfasser: Baldovino, F. H., Quitain, A. T., Dugos, Nathaniel P., Roces, Susan A., Koinuma, Masayoshi, Yuasa, M., Kida, T.
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Sprache:eng
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Zusammenfassung:A novel and efficient approach to the synthesis of nitrogen-functionalized graphene oxide (GO) using aqueous ammonia, NH 3 (aq.), under high-temperature and high-pressure conditions was investigated. Nitrogen groups (N-groups) were incorporated in GO in different ways; by replacing the carbon (C) atoms and reacting with the oxygenated functionalities present in GO. Reaction mechanisms were proposed, showing how N-groups were attached to GO. Functionalization was confirmed using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance (NMR) spectroscopy and elemental analysis (EA). Raman spectroscopy, X-ray diffraction spectroscopy (XRD), and scanning electron microscopy (SEM) were employed to further characterize GO modification. Functionalization was carried out to increase GO adaptability to a wide range of applications, including carbon dioxide (CO 2 ) capture and electrochemical oxygen reduction as reported.
ISSN:2046-2069
2046-2069
DOI:10.1039/C6RA22885B