Sonochemical Assisted Europium(III) Oxide–Graphitic-Carbon Nitride Nanocomposite for Reversible Electrochemical Detection of Quinol

A new sensor material was constructed to facilitate the reversible detection of Quinol (QL). QL is an isomer of dihydroxybenzene, which poses threats to the environment due to their abundance spillage and wastage from many day-to-day life and healthcare by-products. To recycle the wasted QL from industries, we have prepared a sensor that can oxidize those unwanted QL into less-carcinogenic products and further utilize the same sensor to reduce the benzoquinone into QL. We have successfully prepared the sonochemical assisted nanocomposite of fish scale-like europium(III) oxide (EuO) and graphitic carbon nitride (g-C 3 N 4 ) (Eu-CN). The proposed material’s structural and morphological characteristics have been proved using various instruments. In addition, the proposed sensor shows exceptional electrocatalytic activity towards QL having wider linear range from 0.01 μM to 681.09 μM with detection limit (LOD) of 4.71 nM. Also, the prepared Eu-CN sensor showed the excellent potential towards reduction of benzoquinone having wide linear range from 1 μM to 870 μM with LOD of 123.46 nM. The sensor also exhibited excellent stability in terms of longer storage and repeatability towards the detection of QL. By facilitating the Eu-CN, the real time detection of QL in tap water and river water showed a promising result.