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陈海群教授课题组在“Journal of Applied Electrochemistry”发表研究论文

   发布时间: 2015-02-02    访问次数: 498

 

Electrochemical Detection of Bisphenol A at Graphene/Melamine Nanoparticles Modified Glassy Carbon Electrode

 

R. Y. Shen(申荣艳), W. M. Zhang, Y. Yuan, G. Y. He* and H. Q. Chen*

Journal of Applied Electrochemistry. 2015DOI: 10.1007/s10800-015-0792-5

Abstract: Due to the unique electronic properties and high adsorption capacity of graphene, a facile strategy was developed to form graphene/melamine nanocomposite by anchoring melamine molecule on the surface of graphene sheets. As the electrostatic attraction happened between protonated melamine and negatively charged bisphenol A (BPA), a novel electrochemical sensor was fabricated to determine the endocrine disruptor BPA by depositing graphene/melamine nanocomposite on the surface of glassy carbon electrode (GCE). The electrochemical behavior of BPA was investigated in phosphate buffer solution (pH 7.0) using the prepared sensor. A well defined anodic peak at 0.56 V was found to attribute to the electrooxidation of BPA on the modified electrode. The kinetic parameters, charge transfer coefficient, electron transfer number, proton transfer number, and standard rate constant were calculated and optimized. The electrochemical sensor exhibited a wider linear range of 1.0 × 10-8 to 2.0 × 10-4 M BPA and a lower detection limit of 4.0 × 10-9 M (S/N = 3). This novel sensor was successfully applied to determine BPA leached from real plastic samples with good recovery ranging from 97.00% to 100.96%.