High-sensitivity, selective determination of dopamine using bimetallic nanoparticles modified boron-doped diamond electrode with anodic polarization treatment

Haichao Li, Yaohua Guo, Sichao Zeng, Qiuping Wei, Pei San (Sharel) E, Ruitong Zhu, Jun Cao, Li Ma, Kechao Zhou, Lingcong Meng

Research output: Contribution to journalArticlepeer-review

Abstract

Selective detection of dopamine is still a challenge due to the strong interference from ascorbic acid (AA). A hybrid dopamine electrochemical sensor was fabricated by boron-doped diamond (BDD) film co-modified with gold nanoparticles and graphite-coated nickel nanoparticles (Au-C@Ni/BDD). Highly sensitive and selective detection toward dopamine was achieved by multiple electrochemical anodic polarization treatment (EAPT) with relatively mild voltage (+ 1.6 V vs. Ag/AgCl) on Au-C@Ni/BDD electrode. Specifically, the oxidation peak separation between ascorbic acid and dopamine reached 166 mV, and the limit of detection of dopamine was as low as 0.015 μM in a linear concentration range of 0.05–100 μM with the sensitivity up to 1.99 μA μM −1 cm −2 even in the presence of interference of high-level AA. These could be ascribed to the electrocatalytically active sites and functional oxygen-containing groups of the hybrid electrodes produced by the EAPT and the excellent catalytical activity of gold nanoparticles. Graphical Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)4700–4715
Number of pages16
JournalJournal of Materials Science
Volume56
Issue number7
DOIs
Publication statusPublished - 24 Nov 2020

Bibliographical note

Funding Information:
We gratefully acknowledge the National Key Research and Development Program of China (No. 2016YFB0301402, No. 2016YFB0402705), the National Natural Science Foundation of China (No. 51601226, No. 51874370, No. 51302173), the State Key Laboratory of Powder Metallurgy, the Fundamental Research Funds for the Central Universities of Central South University (2018zzts014 and 2017gczd024), and the financial supports from the Postgraduate Research and Innovation Project of Central South University (No. 1053320170851, No. 2018zzts403), China. The authors also wish to thank the reviewers and editor for kindly giving revising suggestions.

Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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