Nano Research

, Volume 5, Issue 12, pp 875–887 | Cite as

Preparation, characterization, and application of electrochemically functional graphene nanocomposites by one-step liquid-phase exfoliation of natural flake graphite with methylene blue

Research Article


Electrochemically functional graphene nanocomposites have been directly prepared by one-step liquid-phase exfoliation of natural flake graphite with methylene blue (MB). UV-visible spectra of the obtained aqueous dispersions of graphene-methylene blue (G-MB) nanocomposite at different exfoliation time indicate that the concentration of graphene dispersion increased markedly with increasing exfoliation time. Atomic force microscopy (AFM) and Raman spectroscopy verified that the graphene was exfoliated into single-layer or bilayer states. FT-IR spectroscopy of G-MB suggests that a π-π stacking interaction is involved in the structure-associated interactions between graphene and adsorbed MB molecules. A G-MB nanocomposite modified glassy carbon (GC) electrode exhibits excellent electrochemical properties and good electrochemical stability. Additionally, the G-MB/GC modified electrode shows more favorable electron transfer kinetics for potassium ferricyanide and potassium ferrocyanide probe molecules, which are important electroactive compounds, compared with reduced graphene oxide (RGO)-MB/GC, RGO/GC, bare GC and graphite/GC electrodes. Furthermore, the G-MB/GC modified electrode exhibits good electrocatalytic activity toward hydrogen peroxide (H2O2) and β-nicotinamide adenine dinucleotide (NADH). The excellent electroactivity, electrochemical stability and electrocatalytic activity of the G-MB nanocomposites prepared in this work are potentially very useful for basic electrochemical studies and for the practical development of electronic devices such as biosensors and photovoltaic cells.


Graphene nanocomposite liquid-phase exfoliation methylene blue electrochemistry 


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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.School of MedicineXi’an Jiaotong UniversityXi’anChina
  2. 2.College of Chemistry and Molecular ScienceWuhan UniversityWuhanChina
  3. 3.Center for Nanochemistry (CNC), Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijingChina
  4. 4.Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical EngineeringShanxi Normal UniversityXi’anChina

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