Bioinspired silver nanoparticles/reduced graphene oxide nanocomposites for catalytic reduction of 4-nitrophenol, organic dyes and act as energy storage electrode material. (15th September 2019)

• Record Type: Journal Article
• Authors: Kolya, Haradhan; Kuila, Tapas; Kim, Nam Hoon; Lee, Joong Hee
• Is Part Of: Composites. Number 173(2019)
• Publication Date: 2019-09-15
• Subjects: Silver nanoparticles -- Nanocomposites -- Graphene oxide -- Nano-catalyst -- Reduction; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2019.106924
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Facile and a novel technique for bioinspired synthesis of silver nanoparticles (AgNPs) using an aqueous extract of mango ( Mangifera indica) flower as stabilizing and reducing agent was demonstrated. The formation of AgNPs and AgNPs/rGO nanocomposites were confirmed through extensive experimental characterization and numerical analysis. Both, AgNPs and AgNPs/rGO nanocomposites showed excellent catalytic performance in catalytic hydrogenation of 4-nitrophenol and azo bond in dye molecules. The rGO supported Ag nanocomposites exhibited improved catalytic activity compared to AgNPs due to the enhancement of surface area. Electrochemical analysis of AgNPs/rGO nanocomposites showed specific capacitance (SC) of ∼532 F g −1 at a current density of 1.0 A g −1 . About 92% retention in SC after 2000 charge-discharge cycles suggested long-term electrochemical cyclic stability as supercapacitor electrode materials. The biogenic nano-particles and composites implied that the rGO reinforced Ag excellent applicants as hydrogenation refining materials. All these observations demonstrated a novel, eco-cost effective and estimable candidates as hydrogenation refining materials and electrode materials. Highlights: Bioinspired silver nanoparticles/reduced graphene oxide nanocomposites. This process is fast, easy, hazard free, and inexpensive. Characterized by instrumental as well as theoretical study. Efficient catalyst in hydrogenation of nitroarene and azo dye. Relevant to the industrial wastewater purification and supply of energy.