Sensitive and low-potential electrochemical detection of hydroquinone using a nanodiamond modified glassy carbon electrode

Tse Wei Chen, Selvakumar Palanisamy, Shen Ming Chen, Vijayalakshmi Velusamy, Yung Hsien Liu, Tien Wen Tseng, Ming Chin Yu, Shih Yi Lee, Wen Han Chang, Xiaoheng Liu

    Research output: Contribution to journalArticlepeer-review

    17 Scopus citations

    Abstract

    The present work describes the sensitive and low-potential detection of hydroquinone (HQ) using a glassy carbon electrode (GCE) modified with nanodiamond (ND). The presence of ND was confirmed by high-resolution scanning electron microscopy, FTIR and Raman spectroscopy. The cyclic voltammetry results reveal that ND modified GCE has high electrocatalytic activity towards oxidation of HQ than unmodified GCE. In addition, the ND modified GCE shows a significantly lower oxidation potential towards CC than unmodified GCE, which is due to the presence of -OH functional groups in ND. The CV studies confirm that the redox electrochemical behavior of CC is a diffusion controlled electrochemical process on ND modified electrode. The ND modified electrode was able to detect the HQ across a linear response range from 1.0 to 78.0 μM. The limit of detection of the sensor was 0.19 μM. The sensor shows an appropriate selectivity in the presence of 20-fold concentrations of benzenediols and neurotransmitters. The practicality of the sensor is appropriate and shows excellent recovery of HQ in lab water samples.

    Original languageBritish English
    Pages (from-to)8021-8032
    Number of pages12
    JournalInternational Journal of Electrochemical Science
    Volume12
    Issue number9
    DOIs
    StatePublished - 1 Sep 2017

    Keywords

    • Cyclic voltammetry
    • Electroanalysis
    • Hydroquinone
    • Modified electrode
    • Nanodiamond

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