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A ZIF-8 derived nitrogen-doped porous carbon and nitrogen-doped graphene nanocomposite modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

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Abstract

A voltammetric sensor was developed using a nitrogen-doped porous carbon and nitrogen-doped graphene nanocomposite modified glassy carbon electrode for the simultaneous determination of dopamine (DA), uric acid (UA) and ascorbic acid (AA). Detailed characteristics of the nanocomposites were investigated by SEM, TEM, XPS, XRD and FT-IR. Experimental conditions such as accumulation time, accumulation potential and buffer solution pH were optimized. The sensor demonstrated a linear plot of 0.01–15.0 mmol L−1 for AA, 0.08–350.0 μmol L−1 for DA, and 0.5–100.0 μmol L−1 for UA, with detection limits of 1.99 μmol L−1, 0.011 μmol L−1 and 0.088 μmol L−1, respectively. The established method exhibited excellent reproducibility, anti-interference and stability, and it was applied to DA, UA and AA determination in real urine samples with recoveries between 100.2% and 102.0%.

Graphical abstract: A ZIF-8 derived nitrogen-doped porous carbon and nitrogen-doped graphene nanocomposite modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

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Publication details

The article was received on 09 Aug 2019, accepted on 26 Sep 2019 and first published on 04 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ04095A
New J. Chem., 2019, Advance Article

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    A ZIF-8 derived nitrogen-doped porous carbon and nitrogen-doped graphene nanocomposite modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

    G. Luo, Y. Deng, X. Zhang, R. Zou, W. Sun, B. Li, B. Sun, Y. Wang and G. Li, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ04095A

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