Towards graphene bromide : bromination of graphite oxide
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...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/96757 http://hdl.handle.net/10220/38491 |
| _version_ | 1826118991160016896 |
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| author | Jankovský, O. Šimek, P. Klimová, K. Sedmidubský, D. Matějková, S. Pumera, Martin Sofer, Z. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Jankovský, O. Šimek, P. Klimová, K. Sedmidubský, D. Matějková, S. Pumera, Martin Sofer, Z. |
| author_sort | Jankovský, O. |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T04:52:42Z |
| format | Journal Article |
| id | ntu-10356/96757 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:52:42Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/967572023-02-28T19:31:50Z Towards graphene bromide : bromination of graphite oxide Jankovský, O. Šimek, P. Klimová, K. Sedmidubský, D. Matějková, S. Pumera, Martin Sofer, Z. School of Physical and Mathematical Sciences DRNTU::Engineering::Materials::Nanostructured materials 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. Published version 2015-08-21T06:17:24Z 2019-12-06T19:34:38Z 2015-08-21T06:17:24Z 2019-12-06T19:34:38Z 2014 2014 Journal Article Jankovský, O., Šimek, P., Klimová, K., Sedmidubský, D., Matějková, S., Pumera, M., et al. (2014). Towards graphene bromide: bromination of graphite oxide. Nanoscale, 6(11), 6065-6074. https://hdl.handle.net/10356/96757 http://hdl.handle.net/10220/38491 10.1039/C4NR01154F en Nanoscale © 2014 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. 10 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Nanostructured materials Jankovský, O. Šimek, P. Klimová, K. Sedmidubský, D. Matějková, S. Pumera, Martin Sofer, Z. Towards graphene bromide : bromination of graphite oxide |
| title | Towards graphene bromide : bromination of graphite oxide |
| title_full | Towards graphene bromide : bromination of graphite oxide |
| title_fullStr | Towards graphene bromide : bromination of graphite oxide |
| title_full_unstemmed | Towards graphene bromide : bromination of graphite oxide |
| title_short | Towards graphene bromide : bromination of graphite oxide |
| title_sort | towards graphene bromide bromination of graphite oxide |
| topic | DRNTU::Engineering::Materials::Nanostructured materials |
| url | https://hdl.handle.net/10356/96757 http://hdl.handle.net/10220/38491 |
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