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 Authors: Ismail, Faizatun Nabilah Nor; Ikhsan, Nurul Izrini
• Format: Article; Early Access
• Language: English
• Published: TAYLOR & FRANCIS INC 2024
• Subjects: Chemistry; Science & Technology - Other Topics; Materials Science; Physics
• Online Access: https://www-webofscience-com.uitm.idm.oclc.org/wos/woscc/full-record/WOS:001310037300001
• ISSN: 1536-383X; 1536-4046
• DOI: 10.1080/1536383X.2024.2401506

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 Omega) and highest conductance (14.52 x 10-3 Sm-1). Consequently, this sample demonstrates superior electrical properties, making it ideal for various electrical device applications. Silver nanoparticles were successfully deposited onto reduced graphene oxide (rGO) sheets, creating an rGO-Ag nanohybrid through a simple synthetic approach using galactose as both a reducing and stabilizing agent at varying reaction times. This rGO-Ag nanohybrid demonstrated superior electrical conductivity characteristics. The novelty of our study is we synthesis a Reduced Graphene Oxide (rGO-Ag) nanohybrid by combining Silver Nanoparticles (AgNPs) with Reduced Graphene Oxide (rGO) surface using galactose which served as both reducing and stabilizing agents with varying reaction time and demonstrate its electrical conductivity.