One-pot synthesis and characterizations of highly conductive reduced graphene oxide-silver nanohybrid at various reaction time

• Published in: Fullerenes Nanotubes and Carbon Nanostructures
• Main Author: Nor Ismail F.N.; Ikhsan N.I.
• Format: Article
• Language: English
• Published: Taylor and Francis Ltd. 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85203558414&doi=10.1080%2f1536383X.2024.2401506&partnerID=40&md5=00cb3e6577d6da388ef0e28e36723776

Silver nanoparticles (AgNPs) were incorporated with reduced graphene oxide (rGO) sheets to form rGO-Ag nanohybrid. The nanohybrid was synthesized using galactose as both reducing and stabilizing agents in various reaction times (4, 8, 16, and 24 hours). Its morphological and structural characteristics were analyzed using UV–Visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Raman Spectroscopy. Electrical conductivity was assessed with a two-point probe method. The 16 hours synthesis time produced the best results: UV–Vis confirmed monodispersed spherical AgNPs on rGO; XRD indicated a crystallite size of 11.83 nm; and HRTEM showed the formation of AgNPs with average size 11 nm. Additionally, 16-h rGO-Ag nanohybrid exhibited the lowest resistance (68.82 Ω) and highest conductance (14.52 × 10−3 Sm−1). Consequently, this sample demonstrates superior electrical properties, making it ideal for various electrical device applications. © 2024 Taylor & Francis Group, LLC.