Chemical Makeup and Hydrophilic Behavior of Graphene Oxide Nanoribbons after Low-Temperature Fluorination

Rebeca Romero Aburto, Lawrence B. Alemany, Thomas K. Weldeghiorghis, Sehmus Ozden, Zhiwei Peng, Aurélien Lherbier, Andrés Rafael Botello Méndez, Chandra Sekhar Tiwary, Jaime Taha-Tijerina, Zheng Yan, Mika Tabata, Jean Christophe Charlier, James M. Tour, Pulickel M. Ajayan

Resultado de la investigación

26 Citas (Scopus)

Resumen

Here we investigated the fluorination of graphene oxide nanoribbons (GONRs) using H2 and F2 gases at low temperature, below 200°C, with the purpose of elucidating their structure and predicting a fluorination mechanism. The importance of this study is the understanding of how fluorine functional groups are incorporated in complex structures, such as GONRs, as a function of temperature. The insight provided herein can potentially help engineer application-oriented materials for several research and industrial sectors. Direct 13C pulse magic angle spinning (MAS) nuclear magnetic resonance (NMR) confirmed the presence of epoxy, hydroxyl, ester and ketone carbonyl, tertiary alkyl fluorides, as well as graphitic sp2-hybridized carbon. Moreover, 19F-13C cross-polarization MAS NMR with 1H and 19F decoupling confirmed the presence of secondary alkyl fluoride (CF2) groups in the fluorinated graphene oxide nanoribbon (FGONR) structures fluorinated above 50°C. First-principles density functional theory calculations gained insight into the atomic arrangement of the most dominant chemical groups. The fluorinated GONRs present atomic fluorine percentages in the range of 6-35. Interestingly, the FGONRs synthesized up to 100°C, with 6-19% of atomic fluorine, exhibit colloidal similar stability in aqueous environments when compared to GONRs. This colloidal stability is important because it is not common for materials with up to 19% fluorine to have a high degree of hydrophilicity.

Idioma originalEnglish
Páginas (desde-hasta)7009-7018
Número de páginas10
PublicaciónACS Nano
Volumen9
N.º7
DOI
EstadoPublished - 28 jul 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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    Romero Aburto, R., Alemany, L. B., Weldeghiorghis, T. K., Ozden, S., Peng, Z., Lherbier, A., Botello Méndez, A. R., Tiwary, C. S., Taha-Tijerina, J., Yan, Z., Tabata, M., Charlier, J. C., Tour, J. M., & Ajayan, P. M. (2015). Chemical Makeup and Hydrophilic Behavior of Graphene Oxide Nanoribbons after Low-Temperature Fluorination. ACS Nano, 9(7), 7009-7018. https://doi.org/10.1021/acsnano.5b01330