Highly Selective Detection of Dihydroxybenzene Isomers via L‐Arginine/Ag‐MnCuO Nanohybrid Modified Glassy Carbon Electrode

The present study reveals the fabrication of transition metal oxides based nanohybrids for the sensitive electroanalytical differentiation of dihydroxybenzene isomers (DHBIs). The Ag‐MnCuO nanohybrid is prepared through the facile combustion method and further functionalized by poly‐arginine (PA). The prepared nanohybrid is validated through X‐ray diffraction, energy‐dispersive X‐ray analysis, field‐emission scanning electron microscopy, and Raman spectroscopy. The glassy carbon electrode is modified with Ag‐MnCuO nanohybrid and forms the PA‐rGO‐Ag‐MnCuO, which exhibits superior electrocatalytic activity for the identification of catechol (CE), hydroquinone (HR), and resorcinol (RO). The prepared nanohybrid on the electrode exhibits higher electrochemical properties with a limit of detection for the detection of CE (0.107 μM), HR (0.069 μM), and RO (0.094 μM). The efficiency of the prepared electrode is validated by a remarkable recovery percentage in the market source of DHBI samples. The proposed electrode demonstrates high stability, selectivity, repeatability, reproducibility, and synchronized detection of DHBIs, highlighting its potential for practical use in photochemical and environmental applications.