abstract

• This study investigated the preparation of graphene oxide from mildly oxidized graphite through ultrasonic exfoliation. Both the original and produced materials were analyzed by ultraviolet-visible spectrophotometer, X-ray diffraction and atomic force microscopy. The results indicated that the exfoliation yield of graphene oxide was proportional to the input ultrasonic energy. In addition, a two-stage exfoliation phenomenon was observed in the exfoliation of mildly oxidized graphite with both ultrasonic homogenizer and cleaner. It also was found that increasing the content of [O] in a C-H2SO4-[O] reaction system was the most simple and direct method to increase the oxidation degree of graphite oxide. © 2017 World Scientific Publishing Company.

authors

• Hu Y.
• Li H.
• Li Z.
• López Valdivieso Alejandro
• Song S.

publication date

• 2017-01-01

funding provided via

• National Natural Science Foundation of China, NSFC: 51474167, 51504176  Grant

published in

• Surface Review and Letters  Journal

keywords

• Graphene oxide; improved Hummers' method; ultrasonic exfoliation Atomic force microscopy; Graphite; Oxidation; X ray diffraction; Direct method; Graphene oxides; Graphite oxide; Oxidation degree; Oxidized graphites; Reaction system; Ultrasonic energy; Visible spectrophotometers; Graphene

Digital Object Identifier (DOI)

• 10.1142/S0218625X17500871

start page

end page

volume

• 24

issue

• 6