Journal
ELECTROCHIMICA ACTA
Volume 71, Issue -, Pages 58-65Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.03.077
Keywords
Fe3O4; Graphene oxide; Electrocatalytic oxidation; Cysteine; N-acetyl cysteine
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Funding
- National Natural Science Foundation of China [20905032, 21065005, 21165010, 21174058]
- Young Scientist Foundation of Jiangxi Province [20112BCB23006]
- Foundation of Jiangxi Educational Committee [GJJ10389]
- State Key Laboratory of Electroanalytical Chemistry [2008003]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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The Fe3O4-graphene oxide (Fe3O4-GO) nanocomposites were prepared by a chemical co-precipitation of FeSO4, FeCl3,center dot NH3 center dot H2O and GO. The Fe3O4-GO was characterized by scanning electron microscopy. X-ray powder diffraction, thermogravimetric analysis and electrochemical method. The results showed that ultrafine Fe3O4 nanoparticles was prepared and densely assembled on GO nanosheets. The Fe3O4-GO exhibits large surface area and high catalysis towards the oxidation of cysteine and N-acetyl cysteine, which could be used for cysteine and N-acetyl cysteine sensing with a wide linear range (0.5-13.5 mM for cysteine and 0.12-13.3 mM for N-acetyl cysteine) and low detection limit (56 mu M for cysteine and 25 mu M for N-acetyl cysteine). The excellent catalytic activity, high sensitivity and good stability made such Fe3O4-GO nanocomposites to be promising nanomaterials for constructing nonenzymatic sensor. (C) 2012 Elsevier Ltd. All rights reserved.
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