Abstract - Journal of Industrial and Environmental Chemistry (2020) Volume 4, Issue 4
Synthesis,characterization and preparation of nickel nanoparticles decoratedelectrochemically reduced graphene oxide modified electrode for electrochemical sensing of diclofenac
In this work, nickel nanoparticles (NiNPs) and graphene oxide (GO) were synthesized and characterized independently using UV-Vis, FTIR, high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques. Then, a new glassy carbon electrode modified with electrochemically reduced graphene oxide decorated with nickel nanoparticles (NiNPs/ERGO/GCE) was constructed by electrodeposition. The novel platform, NiNPs/ERGO/GCE, was characterized using SEM, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). SEM analysis clearly revealed efficient incorporation of NiNPs into the graphene sheets on the surface of the electrode. The prepared platform was used for the determination of diclofenac (DIC), a nonsteroidal anti-inflammatory drug (NSAID). A significant enhancement in the peak current response for DIC was observed at the composite modified electrode compared to the unmodified electrode. The NiNPs/ERGO composite modified electrode demonstrated excellent square wave voltammetric response towards the determination of DIC in the working range of 0.25?125 μM.