Towards graphene bromide: Bromination of graphite oxide

O. Jankovský, P. Šimek, K. Klimová, D. Sedmidubský, S. Matějková, M. Pumera, Z. Sofer

Research output: Contribution to journalArticle

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Abstract

Halogenated graphene derivatives are interesting for their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of brominated graphene derivatives by the bromination of graphite oxides. Graphite oxides, prepared according to either the Hummers or Hofmann method, were brominated using bromine or hydrobromic acid under reflux or in an autoclave at elevated temperatures and pressures. The influence of both graphite oxide precursors on the resulting brominated graphenes was investigated by characterization of the graphenes, which was carried out using various techniques, including SEM, SEM-EDS, high-resolution XPS, FTIR, STA and Raman spectroscopy. In addition, the resistivity of the brominated graphenes was measured and the electrochemical properties were investigated by cyclic voltammetry. Although the brominated graphenes were structurally similar, they had remarkably different bromine concentrations. The most highly brominated graphene (bromine concentration above 26 wt%) exhibited a C/O ratio above 44 and partial hydrogenation. Brominated graphenes with such properties could be used for reversible bromine storage or as a starting material for further chemical modifications.

Original languageEnglish
Pages (from-to)6065-6074
Number of pages10
JournalNanoscale
Volume6
Issue number11
DOIs
Publication statusPublished - 2014 Jun 7

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Graphite
Bromine
Bromides
Oxides
Graphene
Derivatives
Scanning electron microscopy
Autoclaves
Chemical modification
Hydrobromic Acid
Electrochemical properties
Chemical properties
Cyclic voltammetry
Hydrogenation
Raman spectroscopy
Energy dispersive spectroscopy
X ray photoelectron spectroscopy
Physical properties
Acids
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Jankovský, O., Šimek, P., Klimová, K., Sedmidubský, D., Matějková, S., Pumera, M., & Sofer, Z. (2014). Towards graphene bromide: Bromination of graphite oxide. Nanoscale, 6(11), 6065-6074. https://doi.org/10.1039/c4nr01154f
Jankovský, O. ; Šimek, P. ; Klimová, K. ; Sedmidubský, D. ; Matějková, S. ; Pumera, M. ; Sofer, Z. / Towards graphene bromide : Bromination of graphite oxide. In: Nanoscale. 2014 ; Vol. 6, No. 11. pp. 6065-6074.
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Jankovský, O, Šimek, P, Klimová, K, Sedmidubský, D, Matějková, S, Pumera, M & Sofer, Z 2014, 'Towards graphene bromide: Bromination of graphite oxide', Nanoscale, vol. 6, no. 11, pp. 6065-6074. https://doi.org/10.1039/c4nr01154f

Towards graphene bromide : Bromination of graphite oxide. / Jankovský, O.; Šimek, P.; Klimová, K.; Sedmidubský, D.; Matějková, S.; Pumera, M.; Sofer, Z.

In: Nanoscale, Vol. 6, No. 11, 07.06.2014, p. 6065-6074.

Research output: Contribution to journalArticle

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Jankovský O, Šimek P, Klimová K, Sedmidubský D, Matějková S, Pumera M et al. Towards graphene bromide: Bromination of graphite oxide. Nanoscale. 2014 Jun 7;6(11):6065-6074. https://doi.org/10.1039/c4nr01154f