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Acta Chimica Sinica >

2012 , Vol. 0 >Issue 05: 617 - 623

DOI: https://doi.org/10.6023/A1107302

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Preparation of the Ordered Mesoporous Carbon/Fe3O4 and Its Application for the Direct Electrochemistry of Hemoglobin

  • Zheng Jing ,
  • Zhao Jiachang ,
  • Gong Chen ,
  • Liu Ping ,
  • Chen Yu ,
  • Huang Huan ,
  • He Pingang ,
  • Fang Yuzhi
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  • a College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620;
    b Department of Chemistry, East China Normal University, Shanghai 200062

Received date: 2011-07-30

  Revised date: 2012-01-12

  Online published: 2012-03-17

Supported by

Project supported by the National Natural Science Foundation of China (No. 20675031) and Innovation Program of Shanghai Municipal Education Commission (No. 09YZ374).

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Abstract

The novel magnetic composites of ordered mesoporous carbon/Fe3O4 were prepared with a micro-wetness impregnation method. The composites were characterized by transmission electron microscope and X-ray diffraction. Hemoglobin was immobilized onto the surface of the composites, and was shown to keep its biological activity well. The electrochemical behavior of Hb was studied, and a pair of well-defined, quasi-reversible cyclic voltammetric redox peaks was obtained, which was characteristics of Hb Fe(III)/Fe(II) redox couples. The formal potential (E0'), the electron transfer number (n), and transfer coefficient (α) were calculated to be －0.306 V, 1.226 and 0.51, respectively. The average apparent heterogeneous electron transfer rate constant (KS) obtained for Hb was 0.0144 s-1. Linear sweep voltammetric measurement of Hb indicated that the peak currents of Hb were linear to its concentration ranging from 3.00×10-6 to 1.50×10-4 mol/L with the detection limits of 0.270×10-6 mol/L.

Key words： ordered mesoporous carbon; ferriferrous oxide; preparation; hemoglobin; direct electrochemistry

Cite this article

Zheng Jing , Zhao Jiachang , Gong Chen , Liu Ping , Chen Yu , Huang Huan , He Pingang , Fang Yuzhi . Preparation of the Ordered Mesoporous Carbon/Fe3O4 and Its Application for the Direct Electrochemistry of Hemoglobin[J]. Acta Chimica Sinica, 2012 , 0(05) : 617 -623 . DOI: 10.6023/A1107302

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