As an important precursor and derivate of graphene, graphene oxide (GO) has received wide attention in recent years. However, the synthesis of GO in an economical and efficient way remains a great challenge. Here we reported an improved NaNO₃-free Hummers method by partly replacing KMnO₄ with K₂FeO₄ and controlling the amount of concentrated sulfuric acid. As compared to the existing NaNO₃-free Hummers methods, this improved routine greatly reduces the reactant consumption while keeps a high yield. The obtained GO was characterized by various techniques, and its derived graphene aerogel was demonstrated as high-performance supercapacitor electrodes. This improved synthesis shows good prospects for scalable production and applications of GO and its derivatives.

中文翻译：

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基于改进的悍马法高效合成氧化石墨烯。

作为石墨烯的重要前体和衍生物，氧化石墨烯（GO）近年来受到广泛关注。然而，以经济有效的方式合成GO仍然是一个巨大的挑战。在这里，我们报告了一个改进的NaNO ₃通过部分取代的KMnO -free Hummers法₄具有K ₂ FeO的₄和控制的浓硫酸的量。与现有的NaNO ₃相比无需使用Hummers方法，这种改进的程序大大减少了反应物消耗，同时保持了高收率。所得到的GO通过各种技术进行了表征，并且其衍生的石墨烯气凝胶被证明是高性能的超级电容器电极。这种改进的合成方法显示了GO及其衍生物的可扩展生产和应用的良好前景。