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Nanomaterials 2018, 8(2), 106; https://doi.org/10.3390/nano8020106

Synthesis of Graphite Oxide with Different Surface Oxygen Contents Assisted Microwave Radiation

1
Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes No. 120, Chihuahua 31136, Chihuahua., Mexico
2
Consejo Nacional de Ciencia y Tecnología (CONACYT)-Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes No. 120., Chihuahua 31136, Chihuahua., Mexico
*
Author to whom correspondence should be addressed.
Received: 10 January 2018 / Revised: 2 February 2018 / Accepted: 5 February 2018 / Published: 13 February 2018
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Abstract

Graphite oxide is synthesized via oxidation reaction using oxidant compounds that have lattice defects by the incorporation of unlike functional groups. Herein, we report the synthesis of the graphite oxide with diverse surface oxygen content through three (B, C, D) different modified versions of the Hummers method assisted microwave radiation compared with the conventional graphite oxide sample obtained by Hummers method (A). These methods allow not only the production of graphite oxide but also reduced graphene oxide, without undergoing chemical, thermal, or mechanical reduction steps. The values obtained of C/O ratio were ~2, 3.4, and ~8.5 for methodologies C, B, and D, respectively, indicating the presence of graphite oxide and reduced graphene oxide, according to X-ray photoelectron spectroscopy. Raman spectroscopy of method D shows the fewest structural defects compared to the other methodologies. The results obtained suggest that the permanganate ion produces reducing species during graphite oxidation. The generation of these species is attributed to a reversible reaction between the permanganate ion with π electrons, ions, and radicals produced after treatment with microwave radiation. View Full-Text
Keywords: graphite oxide; reduced graphene oxide; microwave radiation; modified Hummers method graphite oxide; reduced graphene oxide; microwave radiation; modified Hummers method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ibarra-Hernández, A.; Vega-Rios, A.; Osuna, V. Synthesis of Graphite Oxide with Different Surface Oxygen Contents Assisted Microwave Radiation. Nanomaterials 2018, 8, 106.

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