Palladium-Doped Reduced Graphene Oxide Hybrid Structures for the Micro-Trace Detection of Arsenic (III) Ions

This study focuses on the synthesis techniques and characterization of graphene and reduced graphene oxide (rGO) incorporated with palladium (Pd) nanocomposites, which are essential for enhancing electrochemical sensing applications among others. The nanocomposites in question consist of palladium nanoparticles (Pd NPs) and rGO, which can be synthesized through various methods. In our synthesis approach, K2PdCl4 is thermally reduced at 60C over an 80-minute duration, utilizing ascorbic acid as a reducing agent. This method facilitates the formation of Pd nanoparticles, leveraging the intrinsic properties of rGO, which possesses a substantial surface area that makes it an effective catalyst support. The extensive surface area of rGO allows for a greater density of active sites, which, when combined with Pd NPs, significantly enhances catalytic activity, particularly in processes such as ethanol oxidation, thereby improving electrochemical performance. Various characterization techniques are employed in this research, including UV-Vis, Raman, PL, TEM, and X-ray photoelectron spectroscopy (XPS). The findings provide insights into the diverse synthesis mechanisms of these nanomaterials and their effective applications in electrochemical sensing. Additionally, the investigation addresses the sustainability and reusability of the nanoparticles for long-term applications in this field.