Consequence of oxidation method on graphene oxide produced with different size graphite precursors

[Display omitted] •GO synthesized from different size precursor graphite using different oxidation methods.•Each GO shows distinct TGA, FTIR, and XRD characteristics.•Electrical conductivity correlates with GO flake size estimated by XRD technique.•Precursor size had no influence on rGO derived from...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2017-10, Vol.224, p.150-157
Main Authors: Deemer, Eva M., Paul, Pabitra Kumar, Manciu, Felicia S., Botez, Cristian E., Hodges, Deidra R., Landis, Zachary, Akter, Tahmina, Castro, Edison, Chianelli, Russell R.
Format: Article
Language:English
Subjects:
Basal surfaces
Conductivity
Electrical resistivity
Flakes
Fourier transforms
FTIR
GO papers
Graphene
Graphene oxide
Graphite
Gravimetric analysis
Hummer’s method
Infrared analysis
Nanostructured materials
Oxidation
Planes
Precursors
Production methods
Raman spectroscopy
Scale (corrosion)
Spectrum analysis
Vacuum filtration
X-ray diffraction
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Summary:[Display omitted] •GO synthesized from different size precursor graphite using different oxidation methods.•Each GO shows distinct TGA, FTIR, and XRD characteristics.•Electrical conductivity correlates with GO flake size estimated by XRD technique.•Precursor size had no influence on rGO derived from extensively oxidized GO. Exfoliation method is a most cost effective method for producing chemically derived-graphene (CDG) yet electronic performance of CDG strongly depends on the lateral and vertical dimensions of graphene especially in regards to the development of macroscopic scale films. This work demonstrates the variation in functionality of Graphene oxide (GO) prepared via Marcano-Tour’s and modified Hummer’s method using two different sized graphite precursors. Reduced GO papers were fabricated using vacuum filtration and examined by Hall probe and Raman spectroscopy to ensure their quality. A correlation between oxidation-controlled GO size with their overall electrical conductivity is explored by Fourier Transform Infrared spectroscopy (FTIR), Thermo Gravimetric Analysis (TGA) and X-ray Diffraction (XRD) techniques. This study reveals that the modified Hummer’s method suitably preserves basal planes of GO produced from larger GO flakes with less inter-sheet resistance and illustrates the importance of comparing synthetic methods for producing large area high quality graphene related nanostructures.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2017.07.018