Electrochemical study of brucine on an electrode modified with magnetic carbon-coated nickel nanoparticles |
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Authors: | Sheng-Fu Wang Fen Xie Ruo-Fei Hu |
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Affiliation: | (1) Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, People’s Republic of China |
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Abstract: | A novel type of glassy carbon electrode modified with magnetic carbon-coated nickel nanoparticles (C-Ni/GCE) was fabricated and the electrochemical properties of brucine were studied using it. The carbon-coated nickel nanoparticles showed excellent electrocatalytic activity for the redox of brucine and an enhanced electron transfer rate. The electrochemical behavior of brucine on the C-Ni/GCE was explored by cyclic voltammetry (CV), and a redox mechanism for brucine was proposed. A series of electrochemical parameters were calculated for brucine by CV and controlled-potential electrolysis. The C-Ni/GCE showed good sensitivity, selectivity and stability, and was applied to determine the concentration of brucine. The differential pulse voltammetry (DPV) response of the C-Ni/GCE showed that the catalytic current was linear with the concentration of brucine in the range of 4.7 × 10−8 to 2.4 × 10−4 mol l−1, with a correlation coefficient of 0.998. The detection limit was 1.4 × 10−8 mol l−1. |
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Keywords: | Carbon-coated nickel Magnetic nanoparticles Brucine Electrochemical redox mechanism Determination |
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