A low temperature synthesis of activated carbon from the bio waste for simultaneous electrochemical determination of hydroquinone and catechol

Rajesh Madhu, Selvakumar Palanisamy, Shen Ming Chen, Shakkthivel Piraman

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    32 Scopus citations

    Abstract

    In the present study, the simultaneous determination of hydroquinone (HQ) and catechol (CC) was investigated by using the activated carbon (AC) from dead mango leaves at a low temperature (600 °C). The synthesized AC exhibited a high surface-area of ∼782 m2 g-1. The AC modified electrode exhibited a sensitive and selective detection of HQ and CC than that of other AC modified electrodes which prepared at quite higher temperatures (700 °C, 800 °C, 900 °C). The AC600 holds its high selectivity towards the potentially interfering species compared with other AC modified electrodes. The fabricated AC modified electrode showed a well defined redox peak for HQ and CC with a better peak separation compared with unmodified electrode. The AC modified electrode showed enhanced peak current response with a lower potential of HQ (0.11 V) and CC (0.22 V) compared with bare electrode. The linear response range of HQ and CC was found from 10 to 100 and 5 to 100 nM with the sensitivity of 5.19 and 6.59 μA μM-1 cm-2, respectively. The limit of detection (LOD) was found as 3 nM for HQ and 2 nM for CC at the AC modified electrode, which is the lowest LOD for HQ and CC that ever been reported using carbon nanomaterials modified electrodes.

    Original languageBritish English
    Pages (from-to)84-90
    Number of pages7
    JournalJournal of Electroanalytical Chemistry
    Volume727
    DOIs
    StatePublished - 1 Aug 2014

    Keywords

    • Activated carbon
    • Catechol
    • Electrocatalysis
    • Hydroquinone
    • Simultaneous determination

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