Enhanced Catalytic Reduction and Electrochemical Sensing Properties of Magnetic Fe₃O₄@benzothiazole-Cu(II) Nanoparticles

The preparation of a magnetically recoverable and reusable Fe₃O₄@benzothiazole-Cu(II) nanoparticles with their catalytic and electrochemical sensing properties are reported in this manuscript. The prepared Fe₃O₄@benzothiazole-Cu(II) nanoparticles are characterized using various analytical techniques, including XRD, FTIR, SEM, TEM, XPS, TGA and VSM analysis. The prepared system has shown good catalytic activity in the reduction of 2-NBA, achieving a reaction rate constant of 0.093 min⁻¹ in 2 min with a low catalyst loading. The synthesized catalyst also showed very high efficiency in the reduction of 4-nitro-phenol and methylene blue within 13 min and 4 min, respectively. The prepared material demonstrated good recovery yield and could be reused as a catalyst for multiple cycles without a significant loss in catalytic activity. It also exhibited a remarkable electrochemical sensing capability for the detection of ascorbic acid, H₂O₂, and paracetamol at various concentrations, as determined through cyclic voltammetry and impedance measurements. They exhibited clear redox transformations, indicating the electrochemical sensing ability of the prepared materials.