A Novel Biomimetic Hydrogen Peroxide Biosensor Based on Pt Flowers‐decorated Fe<sub>3</sub>O<sub>4</sub>/Graphene Nanocomposite

Electroanalysis - Tập 29 Số 6 - Trang 1518-1523 - 2017
Xueling Zhao1, Zhanhong Li1, Cheng Chen1, Yihua Wu1, Zhigang Zhu1, Hongli Zhao2, Minbo Lan2
1School of Environmental and Materials Engineering, College of Engineering, Shanghai Polytechnic University, Shanghai, 201209 P. R. China
2Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai 200237 (P.R. China),

Tóm tắt

AbstractA sensitive and selective amperometric H2O2 biosensor was obtained by utilizing the electrodeposition of Pt flowers on iron oxide‐reduced graphene oxide (Fe3O4/rGO) nanocomposite modified glassy carbon electrode (GCE). The morphology of Fe3O4/rGO and Pt/Fe3O4/rGO was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. The step‐wise modification and the electrochemical characteristics of the resulting biosensor were characterized by cyclic voltammetry (CV) and chronoamperometry methods. Thanks to the fast electron transfer at the Pt/Fe3O4/rGO electrode interface, the developed biosensor exhibits a fast and linear amperometric response upon H2O2. The linear range of Pt/Fe3O4/rGO is 0.1∼2.4 mM (R2=0.998), with a sensitivity of 6.875 μA/mM and a detection limit of 1.58 μM (S/N=3). In addition, the prepared biosensor also provides good anti‐interferent ability and long‐term stability due to the favorable biocompatibility of the electrode interface. The proposed sensor will become a reliable and effective tool for monitoring and sensing the H2O2 in complicate environment.

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Electroanalysis

Tập 29 Số 6

1518-1523

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