2024-03-28T12:50:12Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/530212022-11-17T02:08:08Zhdl_2115_20051hdl_2115_144Mass production of graphene oxide from expanded graphiteSun, Ling1000040281844Fugetsu, Bunshiopen accessExpanded graphitegraphene oxidespontaneous expansionmass production549In a deviation from the conventional Hummers method, a spontaneous expansion approach was introduced with expanded graphite as the precursors. The intercalating agent (H2SO4) was able to penetrate into the expanded graphite; this had further expanded the graphite and as a result, a foam-like intermediate was produced. The foam-like graphite was more easily oxidized in reaction with the oxidant (KMnO4) to form graphene oxide (GO). Fully exfoliated GO was obtained with expanded graphite having the median diameter ∼15 μm as the precursors. This procedure was much safer and productive in scalable applications than the conventional Hummers methods.Elsevier, B.V.2013-10-15engjournal articleAMhttp://hdl.handle.net/2115/53021http://www.sciencedirect.com/science/journal/0167577Xhttps://doi.org/10.1016/j.matlet.2013.07.0720167-577XAA1063425XMaterial letters109207210https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/53021/1/2.revison%20-changes%20marked%20-SUN-MS-201300709-materials%20letter.pdfapplication/pdf995.22 KB2013-10-15