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Journal of Nanomaterials
Volume 2015, Article ID 892674, 9 pages
http://dx.doi.org/10.1155/2015/892674
Review Article

Nanocomposites of Graphene with Ferrocene or Hemin: Preparation and Application in Electrochemical Sensing

College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China

Received 20 January 2015; Revised 3 March 2015; Accepted 5 March 2015

Academic Editor: Jian Gong

Copyright © 2015 Ning Xia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Graphene has sparked tremendous interests across many fields such as biosensors, electrochemical energy storage, and electronics due to its extraordinary physicochemical and structural properties. The redox mediator-functionalized graphene composites may obtain highly electroactive materials with better conductivity, dispersion, and compatibility. Ferrocene and hemin, two iron-organic complexes, are the well-known mediators in view of their various properties, including reversibility, regeneration at low potential, and generation of stable redox states. Recently, it has been demonstrated that the use of ferrocene or hemin coupled with graphene can further improve the electrochemical performances of the developed sensors. In this contribution, we, for the first time, reviewed the preparation and applications of ferrocene/graphene and hemin/graphene nanocomposites in electrochemical sensing.