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 NaNO-free Hummers method by partly replacing KMnO with KFeO and controlling the amount of concentrated sulfuric acid. As compared to the existing NaNO-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.
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| http://dx.doi.org/10.1038/srep36143 | DOI Listing |
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