Designing graphene oxide/silver nanoparticles based nanocomposites by energy efficient green chemistry approach and their physicochemical characterization

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2022-10, Vol.284, p.115899, Article 115899
• Main Authors: Sajjad, Mehreen, Ahmad, Fawad, Ali Shah, Luqman, Khan, Musammir
• Format: Article
• Language: English
• Subjects: Allotropy; Chemical synthesis; Clean energy; Crystallites; Gallic acid; Glassy carbon; Graphene; Graphene oxide; Green Chemistry; Industrial applications; Nanocomposites; Nanoparticles; Oxidation; Physicochemical Characterization; Reducing agents; Silver; Silver nanoparticles; Sodium citrate
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2022.115899

[Display omitted] •Graphene oxide/silver nanoparticles nanocomposites (GO/AgNPs-NCs) was designed by ex-situ method using green chemistry approach.•The GO was first prepared by oxidation of graphite using Hummer’s method.•AgNPs was synthesized using two reductants, gallic acid (GA) & tri-sodium citrate (Na3Ct) as capping agents, to obtain (AgNPs-GA-Na3Ct) denoted as AgNPs.•SPR band at 420 nm confirmed the fabrication of AgNPs.•XRD analysis showed the crystallite size of GO as 10.2 nm and AgNPs size as 37 nm.•Cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) indicated the reversible redox process and an increased in electron transfer resistance after coating the GCE with NCs. Graphene, the 2D allotrope of carbon is promising industrial material with unique physicochemical properties. In the present study, graphene oxide (GO) was prepared by oxidation of graphite using the hummer’s method, while AgNPs were synthesized by green chemistry approach, using combination of two reductants gallic acid (GA) and tri-sodium citrate (Na3Ct), simultaneously as capping agents. The UV–visible SPR peak at 420 nm confirmed the successful formation of these NPs. The GO/AgNPs nanocomposites (NCs) was fabricated by homogeneous mixing of the two components. The XRD analysis of the NCs indicated the crystallite size of GO, 10.2 nm and AgNPs size as 37 nm. The presence of oxygenated species, sp2-bonded carbon and metallic Ago at the coated glassy carbon electrode surface were responsible for the redox process and indicated reversible nature of the process. Therefore, this approach is providing an environmental benign method to construct GO/AgNPs NCs for future industrial applications.