Chemical Oxidation of Graphite: Evolution of the Structure
and Properties
Posted on 2017-12-14 - 00:00
Graphene
oxide is a complex material whose synthesis is still incompletely
understood. To study the time evolution of structural and chemical
properties of oxidized graphite, samples at different temporal stages
of oxidation were selected and characterized through a number of techniques:
X-ray photoelectron spectroscopy for the content and bonding of oxygen,
X-ray diffraction for the level of intercalation, Raman spectroscopy
for the detection of structural changes, electrical resistivity measurements
for probing charge localization on the macroscopic scale, and scanning
transmission electron microscopy for the atomic structure of the graphene
oxide flakes. We found a nonlinear behavior of oxygen uptake with
time where two concentration plateaus were identified: Uptake reached
20 at % in the first 15 min, and after 1 h a second uptake started,
reaching a highest oxygen concentration of >30 at % after 2 h of
oxidation.
At the same time, the interlayer distance expanded to more than twice
the value of graphite and the electrical resistivity increased by
seven orders of magnitude. After 4 days of chemical processing, the
expanded structure of graphite oxide became unstable and spontaneously
exfoliated; more than 2 weeks resulted in a significant decrease in
the oxygen content accompanied by reaggregation of the GO sheets.
These correlated measurements allow us to offer a comprehensive view
into the complex oxidation process.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Skákalová, Viera; Kotrusz, Peter; Jergel, Matej; Susi, Toma; Mittelberger, Andreas; Vretenár, Viliam; et al. (2017). Chemical Oxidation of Graphite: Evolution of the Structure
and Properties. ACS Publications. Collection. https://doi.org/10.1021/acs.jpcc.7b10912
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (10)
VS
Viera Skákalová
PK
Peter Kotrusz
MJ
Matej Jergel
TS
Toma Susi
AM
Andreas Mittelberger
VV
Viliam Vretenár
PS
Peter Šiffalovič
JK
Jani Kotakoski
JM
Jannik C. Meyer
MH
Martin Hulman
KEYWORDS
oxygen concentrationchemical Oxidationgraphite oxide15 min2 hoxidation processX-ray diffractionchemical propertiesnonlinear behavioroxygen uptakeRaman spectroscopytime evolutionmacroscopic scaleoxygen contentconcentration plateaus2 weeks4 days1 hresistivity measurementscharge localizationchemical processinggraphene oxide flakesinterlayer distanceX-ray photoelectron spectroscopyscanning transmission electron microscopyProperties Graphene oxide