Journal of Solid State Electrochemistry

, Volume 17, Issue 10, pp 2595–2602

Facile method to synthesize graphene-ZnS nanocomposites: preparation and application in bioelectrochemistry of hemoglobin

Original Paper

DOI: 10.1007/s10008-013-2151-y

Cite this article as:
Wang, L., Qi, W., Su, R. et al. J Solid State Electrochem (2013) 17: 2595. doi:10.1007/s10008-013-2151-y

Abstract

A novel electrochemical platform based on ZnS-doped graphene (GR-ZnS) nanocomposites was developed to achieve the direct electron transfer between hemoglobin (Hb) and the modified electrode. GR-ZnS nanocomposites were synthesized via noncovalent functionalization of pristine graphene (GR) by 1-aminopyrene and subsequent in situ synthesis of ZnS nanoparticles on the GR surface. During this process, the intrinsic electronic properties of GR could be efficiently protected. The as-prepared GR-ZnS nanocomposites were characterized and identified by means of transmission electron microscopy and energy dispersive X-ray spectrometer analysis, indicating the uniform formation of ZnS nanoparticles on the surface of GR. Fourier transform infrared spectra spectroscopic results confirmed that Hb remained its native structure in the nanocomposite material. The GR-ZnS nanocomposites could efficiently promote the direct electron transfer between Hb and electrode with the electron transfer rate constant (ks) of 3.42 s−1. The modified electrode was then used for the determination of H2O2 based on the electrocatalytic activity of Hb towards H2O2, which exhibited a linear range from 10 to 250 μM with a detection limit of 1.12 μM. The proposed method to fabricate GR-based hybrid nanomaterials would have a great potential for applications in various fields such as electrochemical sensing, catalytic reaction, and super capacitors.

Keywords

Graphene ZnS Noncovalent functionalization Direct electron transfer Hemoglobin 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Chemical Engineering Research Center, School of Chemical Engineering and TechnologyTianjin UniversityTianjinPeople’s Republic China
  2. 2.State Key Laboratory of Chemical EngineeringTianjin UniversityTianjinPeople’s Republic of China
  3. 3.Tianjin Key Laboratory of Membrane Science and Desalination TechnologyTianjin UniversityTianjinPeople’s Republic of China
  4. 4.Chemical Engineering Research CenterTianjin UniversityTianjinPeople’s Republic of China

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