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Graphene/clay composite electrode formed by exfoliating graphite with Laponite for simultaneous determination of ascorbic acid, dopamine, and uric acid

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Abstract

Laponite/graphene composite (Lap/G) was prepared by directly exfoliating graphite with Laponite under mechanical grinding. The morphologies and intrinsic physical properties of Lap/G were characterized by transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy. Electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry were used to investigate the electrochemical behavior of Lap/G-modified electrodes. The resulting Lap/G composite exhibited good electroconductivity combined with electrocatalytic activity towards oxidation of small biomolecules such as dopamine. Furthermore, the resulting Lap/G-modified glassy carbon electrodes were applied for simultaneous determination of ascorbic acid, dopamine, and uric acid.

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Acknowledgments

This work was supported by the Natural Science Foundation of China (No. 21345008, 61006011), the Open Research Fund of State Key Laboratory of Analytical Chemistry for Life Science (SKLACLS1211), and the Open Research Fund of State Key Laboratory of Bioelectronics, Southeast University.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China

    Shou-Nian Ding & Chun-Lan Zheng

  2. SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electrical Science and Engineering, Southeast University, Nanjing, 210096, China

    Neng Wan

  3. Départment de Chimie Moléculaire UMR-5250, ICMG FR-2607, CNRS Université Joseph Fourier, BP-53, 38041, Grenoble, France

    Serge Cosnier

Authors
  1. Shou-Nian Ding
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  2. Chun-Lan Zheng
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  3. Neng Wan
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  4. Serge Cosnier
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Correspondence to Shou-Nian Ding.

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Ding, SN., Zheng, CL., Wan, N. et al. Graphene/clay composite electrode formed by exfoliating graphite with Laponite for simultaneous determination of ascorbic acid, dopamine, and uric acid. Monatsh Chem 145, 1389–1394 (2014). https://doi.org/10.1007/s00706-014-1225-6

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  • DOI: https://doi.org/10.1007/s00706-014-1225-6

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