Towards graphene iodide: Iodination of graphite oxide

Petr Šimek, Kateřina Klímová, David Sedmidubský, Ondřej Jankovský, Martin Pumera, Zdeněk Sofer

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Halogenated graphene derivatives are interesting owing to their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of iodinated graphene derivatives by the iodination of graphite oxides prepared according to either the Hummers or Hofmann method. Both graphite oxides were iodinated by iodine or hydroiodic acid under reflux or in an autoclave at elevated temperatures (240 °C) and pressures (over 100 bar). The influence of both graphite oxide precursors on the properties of resulting iodinated graphenes was investigated by various techniques, including SEM, SEM-EDS, high-resolution XPS, FTIR, STA, and Raman spectroscopy. Electrical resistivity was measured by a standard four point technique. In addition, the electrochemical properties were investigated by cyclic voltammetry. Although the iodinated graphenes were structurally similar, they had remarkably different concentrations of iodine. The most highly iodinated graphenes (iodine concentration above 30 wt%) exhibited relatively high C/O ratios, confirming high degrees of reduction. Iodine is incorporated in the form of covalent bonds to carbon atoms or as polyiodide anions non-covalently bonded through the charge transfer reaction with the graphene framework. Iodinated graphenes with such properties could be used as the starting material for further chemical modifications or as flame-retardant additives. This journal is

Original languageEnglish
Pages (from-to)261-270
Number of pages10
JournalNanoscale
Volume7
Issue number1
DOIs
Publication statusPublished - 2015 Jan 7

Fingerprint

Graphite
Iodides
Iodine
Oxides
Graphene
Derivatives
Scanning electron microscopy
Covalent bonds
Autoclaves
Chemical modification
Flame retardants
Electrochemical properties
Flame Retardants
Chemical properties
Cyclic voltammetry
Raman spectroscopy
Charge transfer
Energy dispersive spectroscopy
Negative ions
X ray photoelectron spectroscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Šimek, P., Klímová, K., Sedmidubský, D., Jankovský, O., Pumera, M., & Sofer, Z. (2015). Towards graphene iodide: Iodination of graphite oxide. Nanoscale, 7(1), 261-270. https://doi.org/10.1039/c4nr05219f
Šimek, Petr ; Klímová, Kateřina ; Sedmidubský, David ; Jankovský, Ondřej ; Pumera, Martin ; Sofer, Zdeněk. / Towards graphene iodide : Iodination of graphite oxide. In: Nanoscale. 2015 ; Vol. 7, No. 1. pp. 261-270.
@article{390d2570d1a8426c8d55f955f35ef5f6,
title = "Towards graphene iodide: Iodination of graphite oxide",
abstract = "Halogenated graphene derivatives are interesting owing to their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of iodinated graphene derivatives by the iodination of graphite oxides prepared according to either the Hummers or Hofmann method. Both graphite oxides were iodinated by iodine or hydroiodic acid under reflux or in an autoclave at elevated temperatures (240 °C) and pressures (over 100 bar). The influence of both graphite oxide precursors on the properties of resulting iodinated graphenes was investigated by various techniques, including SEM, SEM-EDS, high-resolution XPS, FTIR, STA, and Raman spectroscopy. Electrical resistivity was measured by a standard four point technique. In addition, the electrochemical properties were investigated by cyclic voltammetry. Although the iodinated graphenes were structurally similar, they had remarkably different concentrations of iodine. The most highly iodinated graphenes (iodine concentration above 30 wt{\%}) exhibited relatively high C/O ratios, confirming high degrees of reduction. Iodine is incorporated in the form of covalent bonds to carbon atoms or as polyiodide anions non-covalently bonded through the charge transfer reaction with the graphene framework. Iodinated graphenes with such properties could be used as the starting material for further chemical modifications or as flame-retardant additives. This journal is",
author = "Petr Šimek and Kateřina Kl{\'i}mov{\'a} and David Sedmidubsk{\'y} and Ondřej Jankovsk{\'y} and Martin Pumera and Zdeněk Sofer",
year = "2015",
month = "1",
day = "7",
doi = "10.1039/c4nr05219f",
language = "English",
volume = "7",
pages = "261--270",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "1",

}

Šimek, P, Klímová, K, Sedmidubský, D, Jankovský, O, Pumera, M & Sofer, Z 2015, 'Towards graphene iodide: Iodination of graphite oxide', Nanoscale, vol. 7, no. 1, pp. 261-270. https://doi.org/10.1039/c4nr05219f

Towards graphene iodide : Iodination of graphite oxide. / Šimek, Petr; Klímová, Kateřina; Sedmidubský, David; Jankovský, Ondřej; Pumera, Martin; Sofer, Zdeněk.

In: Nanoscale, Vol. 7, No. 1, 07.01.2015, p. 261-270.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Towards graphene iodide

T2 - Iodination of graphite oxide

AU - Šimek, Petr

AU - Klímová, Kateřina

AU - Sedmidubský, David

AU - Jankovský, Ondřej

AU - Pumera, Martin

AU - Sofer, Zdeněk

PY - 2015/1/7

Y1 - 2015/1/7

N2 - Halogenated graphene derivatives are interesting owing to their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of iodinated graphene derivatives by the iodination of graphite oxides prepared according to either the Hummers or Hofmann method. Both graphite oxides were iodinated by iodine or hydroiodic acid under reflux or in an autoclave at elevated temperatures (240 °C) and pressures (over 100 bar). The influence of both graphite oxide precursors on the properties of resulting iodinated graphenes was investigated by various techniques, including SEM, SEM-EDS, high-resolution XPS, FTIR, STA, and Raman spectroscopy. Electrical resistivity was measured by a standard four point technique. In addition, the electrochemical properties were investigated by cyclic voltammetry. Although the iodinated graphenes were structurally similar, they had remarkably different concentrations of iodine. The most highly iodinated graphenes (iodine concentration above 30 wt%) exhibited relatively high C/O ratios, confirming high degrees of reduction. Iodine is incorporated in the form of covalent bonds to carbon atoms or as polyiodide anions non-covalently bonded through the charge transfer reaction with the graphene framework. Iodinated graphenes with such properties could be used as the starting material for further chemical modifications or as flame-retardant additives. This journal is

AB - Halogenated graphene derivatives are interesting owing to their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of iodinated graphene derivatives by the iodination of graphite oxides prepared according to either the Hummers or Hofmann method. Both graphite oxides were iodinated by iodine or hydroiodic acid under reflux or in an autoclave at elevated temperatures (240 °C) and pressures (over 100 bar). The influence of both graphite oxide precursors on the properties of resulting iodinated graphenes was investigated by various techniques, including SEM, SEM-EDS, high-resolution XPS, FTIR, STA, and Raman spectroscopy. Electrical resistivity was measured by a standard four point technique. In addition, the electrochemical properties were investigated by cyclic voltammetry. Although the iodinated graphenes were structurally similar, they had remarkably different concentrations of iodine. The most highly iodinated graphenes (iodine concentration above 30 wt%) exhibited relatively high C/O ratios, confirming high degrees of reduction. Iodine is incorporated in the form of covalent bonds to carbon atoms or as polyiodide anions non-covalently bonded through the charge transfer reaction with the graphene framework. Iodinated graphenes with such properties could be used as the starting material for further chemical modifications or as flame-retardant additives. This journal is

UR - http://www.scopus.com/inward/record.url?scp=84920025587&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920025587&partnerID=8YFLogxK

U2 - 10.1039/c4nr05219f

DO - 10.1039/c4nr05219f

M3 - Article

AN - SCOPUS:84920025587

VL - 7

SP - 261

EP - 270

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 1

ER -

Šimek P, Klímová K, Sedmidubský D, Jankovský O, Pumera M, Sofer Z. Towards graphene iodide: Iodination of graphite oxide. Nanoscale. 2015 Jan 7;7(1):261-270. https://doi.org/10.1039/c4nr05219f