Improved Synthesis of Graphene Oxide
Improved Synthesis of Graphene Oxide
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DOI：
10.1021/nn1006368
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发表时间：
2010-08-01
期刊：
影响因子：
17.1
通讯作者：
Tour, James M.
中科院分区：
文献类型：
--
作者：
Marcano, Daniela C.;Kosynkin, Dmitry V.;Tour, James M.
描述了一种用于制备氧化石墨烯（GO）的改进方法。目前，Hummers法（KMnO 4、NaNO 3、H2SO 4）是制备氧化石墨烯最常用的方法。我们已经发现，排除NaNO 3，增加KMnO 4的量，并在H2SO 4/H3 PO 4的9：1混合物中进行反应，提高了氧化过程的效率。与Hummers方法或具有额外KMnO 4的Hummers方法相比，这种改进的方法提供了更大量的亲水性氧化石墨烯材料。此外，即使通过我们的方法制备的GO比通过Hummers的方法制备的GO氧化得更多，当两者在同一室中用肼还原时，由这种新方法制备的化学转化的石墨烯（CCG）在其电导率方面是等同的。与Hummers的方法相比，新方法不会产生有毒气体，温度容易控制。GO的这种改进的合成对于GO的大规模生产以及由随后的CCG组成的装置的构造可能是重要的。
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 construction of devices composed of the subsequent CCG.