Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 14 1 2018 03 01 Ultrasound Assisted Green Synthesis and Characterization of Graphene Oxide 11 17 30196 EN A. Farazas Department of Mechanical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece. A. Mavropoulos Department of Mechanical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece. D. Christofilos Department of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece. I. Tsiaousis School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece. D. Tsipas Department of Mechanical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece. Journal Article 2017 05 31 <em>   Graphene oxide (GO) was prepared by an improved green chemical method using graphite flakes, KMnO₄, a mixture of H₂SO₄/H₃PO₄, H₂O₂ and HCl. In several stages, ultrasound was used to separate the oxidized layers of GO. The use of ultrasound optimizes the effect of the reacting agents, decreasing the required amounts of used chemicals. This method produces graphene oxide highly oxidized with greater interlayer spacing over the Hummers’ method without producing toxic gases. The final product was characterized by UV-VIS, XRD, optical microscopy, TEM and Raman Spectroscopy and all used techniques verified the desirable outcome. The results showed that this low cost method is fully scalable without producing undesirable environmental effects.</em> https://www.ijnnonline.net/article_30196_517031b6fd0886eff061c75e19f2d41f.pdf