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.