Abstract
An enhanced electrochemical sensing platform based on photoreduced graphene-polyoxometalate (PRG-POM) nanomaterials prepared by UV-assisted photoreduction method was developed for the simultaneous detection of hydroquinone (HQ), catechol (CT), and resorcinol (RS). Taking advantage of the combined benefits of graphene and POMs, these PRG-POMs nanomaterials showed fast electron-transfer kinetics for the Fe(CN)63−/4−redox system and prominent electrocatalytic activity for simultaneously determining the species mentioned above. With this sensing platform, the lowest concentration to quantify CT, HQ, and RS could be down to 40 nM, 50 nM and 90 nM, respectively. Furthermore, real samples including underground water and lake water were analyzed using the present sensing platform, and experimental results demonstrated that this electrochemical sensor exhibited excellent recoveries.
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