Mass production of graphene oxide from expanded graphite

By Ling Sun, Bunshi Fugetsu. 2013

249 citations recorded by the source corpus.

Abstract In 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.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/903b0dcc4504dbb5572e86c0ddf907d0589d4f69

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In Biomedical Engineering

In Electrical and Electronic Engineering

In Materials Chemistry

Citations in the corpus

Synthesis, properties, and applications of graphene oxide/reduced graphene oxide and their nanocomposites (2019, background): “Other researchers modify graphite into expanded graphite by thermal treatment or exposure to strong oxidizers to increase the interlayer spacing of the carbon source, resulting in easier delamination of the graphite oxide layers [30,31].”
A Simple Approach to Stepwise Synthesis of Graphene OxideNanomaterial (2015, background): “The completely oxidized compound can then be dispersed in a base solution such as water, and graphene oxide is then produced [1-22].”
Production and processing of graphene and related materials (2020, methodology): “It can be used for the preparation of GRM by liquid methods [147].”
Structure and synthesis of graphene oxide (2019, methodology): “Yu et al. [36] used K2FeO4 to partly replace KMnO4 (Figure 4B) and at the same time reduced the acid amount to the same extent as previously Sun et al. reported in their modified NaNO3-free method, demonstrating well effectiveness except for a longer time versus original Hummers method.”