Evaluation of a Nanocomposite Based on Reduced Graphene Oxide and Gold Nanoparticles as an Electrochemical Platform for Detection of Sulfamethazine

• Main Authors: Martin Silva, Ivana Cesarino
• Format: Article
• Language: English
• Published: MDPI AG 2019-06-01
• Series: Journal of Composites Science
• Subjects: graphene; gold nanoparticles; sulfamethazine; nanocomposite
• Online Access: https://www.mdpi.com/2504-477X/3/2/59

A nanocomposite based on reduced graphene oxide (rGO) and gold nanoparticles (AuNPs) was synthesized by the microwave-assisted hydrothermal method and applied in the determination of sulfamethazine (SMZ) in swine effluent using a glassy carbon (GC) electrode. The rGO-AuNPs nanocomposite was characterized morphologically, electrochemically and spectrochemically, showing that rGO was modified with the AuNPs. The GC/rGO-AuNPs electrode was optimized for the determination of SMZ, achieving detection limits of 0.1 μmol L^−1. The proposed sensor was successfully applied to the determination of SMZ in synthetic swine effluent samples.