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Tuning the nature of nitrogen atoms in N-containing reduced graphene oxide.
- Source :
-
Carbon . Jan2016, Vol. 96, p594-602. 9p. - Publication Year :
- 2016
-
Abstract
- Physical and chemical properties of graphene can be tailored by nitrogen doping. As a consequence of the continuous race to achieve the highest possible amount of doping there is a growing tendency to assume that all N species are incorporated within the graphene lattice (doping). Here we show that this is not always the case and employ several complementary techniques that allow a proper assessment of the type of nitrogen present. The nature of the nitrogen atoms has been tuned by ammonolysis of graphene oxide in the range of 100 °C–800 °C. This allows us to expand the capabilities of the synthetic approach to afford not only N-doping (at high temperature) but also to introduce amine and amide moieties at 100 °C; the latter presenting a much higher dispersability in aqueous media than graphene oxide. Interestingly, the sample with the highest amount of nitrogen (14.7 wt. %) cannot be referred to as N-doped graphene since it also contains N-bearing aliphatic moieties. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITROGEN
*GRAPHENE oxide
*DOPING agents (Chemistry)
*NITROGEN compounds
*AMIDES
Subjects
Details
- Language :
- English
- ISSN :
- 00086223
- Volume :
- 96
- Database :
- Academic Search Index
- Journal :
- Carbon
- Publication Type :
- Academic Journal
- Accession number :
- 111097907
- Full Text :
- https://doi.org/10.1016/j.carbon.2015.09.085