Innovative Electrochemical Sensor Based on Fe3O4@Fe-BTC Nanocomposite to Sensitive Determination of 4-Nitrophenol

The Fe3O4@Fe-BTC nanocomposite has been thoroughly investigated in this study. The synthesis of Fe-BTC framework has involved a solvothermal method, while Fe3O4 NPs have been prepared using a coprecipitation technique. The resulting materials have been characterized using various techniques (XRD, FT-IR spectra, and SEM images). The electrochemical behaviors have been analyzed using CV and EIS. More interestingly, the electrochemical performance of 4-nitrophenol (4-NP) has also been investigated on the various modified electrodes via CV, DPV, and CA measurements in a 0.1M PBS buffer by studying the electrochemical reduction of 4-NP. Remarkably, the Fe3O4@Fe-BTC nanocomposites have exhibited enhanced electrochemical properties when compared with the individual Fe3O4 and Fe-BTC components. This improvement could be attributed to the synergistic effects of the highly porous Fe-BTC and the magnetic Fe3O4 NPs, leading to enhanced electron transfer kinetics and electrocatalytic activity. These findings underscore the potential of designed nanocomposite materials for various electrochemical applications.