Journal Article10.1021/NN1006368
Improved Synthesis of Graphene Oxide
Daniela C. Marcano,Dmitry V. Kosynkin,Jacob M. Berlin,Alexander Sinitskii,Zhengzong Sun,Alexander S. Slesarev,Lawrence B. Alemany,Wei Lu,James M. Tour +8 more
TL;DR: An improved method for the preparation of graphene oxide (GO) is described, finding that excluding the NaNO(3), increasing the amount of KMnO(4), and performing the reaction in a 9:1 mixture of H(2)SO(4)/H(3)PO(4) improves the efficiency of the oxidation process.
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Abstract: An improved method for the preparation of graphene oxide (GO) is described. Currently, Hummers’ method (KMnO4, NaNO3, H2SO4) is the most common method used for preparing graphene oxide. We have found that excluding the NaNO3, increasing the amount of KMnO4, and performing the reaction in a 9:1 mixture of H2SO4/H3PO4 improves the efficiency of the oxidation process. This improved method provides a greater amount of hydrophilic oxidized graphene material as compared to Hummers’ method or Hummers’ method with additional KMnO4. Moreover, even though the GO produced by our method is more oxidized than that prepared by Hummers’ method, when both are reduced in the same chamber with hydrazine, chemically converted graphene (CCG) produced from this new method is equivalent in its electrical conductivity. In contrast to Hummers’ method, the new method does not generate toxic gas and the temperature is easily controlled. This improved synthesis of GO may be important for large-scale production of GO as well as the ...
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TL;DR: Surfactant-wrapped chemically converted graphene sheets obtained from reduction of graphene oxide with hydrazine were functionalized by treatment with aryl diazonium salts, allowing alternative avenues for simple incorporation into different polymer matrices.
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TL;DR: In this article, an inexpensive, massively scalable, fast, and facile method for preparation of graphite oxide and reduced graphene oxide nanoplatelets is reported, which is based on the generation of oxygen-containing groups on graphene sheets.
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Spontaneous high-concentration dispersions and liquid crystals of graphene
Natnael Behabtu,Jay R. Lomeda,Micah J. Green,Amanda L. Higginbotham,Alexander Sinitskii,Dmitry V. Kosynkin,Dmitri E. Tsentalovich,A. Nicholas G. Parra-Vasquez,Judith Schmidt,Ellina Kesselman,Yachin Cohen,Yeshayahu Talmon,James M. Tour,James M. Tour,Matteo Pasquali +14 more
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