Enhanced sunlight-driven photocatalytic, supercapacitor and antibacterial applications based on graphene oxide and magnetite-graphene oxide nanocomposites. Issue 19 (1st October 2022)

• Record Type: Journal Article
• Authors: Umar, Ahmad; Kumar, S. Ashok; Inbanathan, S.S.R.; Modarres, Maryam; Kumar, Rajesh; Algadi, Hassan; Ibrahim, Ahmed A.; Wendelbo, Rune; Packiaraj, R.; Alhamami, Mohsen A.M.; Baskoutas, S.
• Is Part Of: Ceramics international. Volume 48:Issue 19(2022)Part B
• Page Start: 29349
• Page End: 29358
• Publication Date: 2022-10-01
• Subjects: Graphene oxide -- Magnetite nanoparticles -- Dye-degradation -- Supercapacitor application -- Antibacterial properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.371
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Herein, we report an enhanced sunlight-driven photocatalytic, supercapacitor and antibacterial applications based on graphene oxide (GO) and magnetite -graphene oxide (Fe3 O4 -GO) nanocomposites. The materials were synthesized by the facile chemical precipitation method and examined in detail by various techniques including field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV–Visible (UV–Vis.) spectroscopy, Fourier transform infrared (FTIR) spectroscopy and vibrating sample magnetometer (VSM). The effective production of GO and Fe3 O4 -GO nanocomposite was validated by XRD, while UV–Vis. measurements demonstrated a smaller bandgap for the nanocomposites. The uniform distribution of Fe3 O4 nanoparticles over GO nanosheets were observed through FESEM and TEM studies. The prepared materials were further utilized as sun-light driven photocatalyst for the degradation of methylene blue (MB) dye, working electrode for the supercapacitor application and efficient biomaterial to examine the antibacterial characteristics against Gram-positive ( S. aureus ) and Gram-negative ( E. Coli ) bacterial strains. As an efficient photocatalyst, the Fe3 O4 -GO nanocomposites exhibited a rapid degradation (91% in 30 min) for methylene blue dye under direct sunlight irradiation. The synthesized nanocomposite exhibited a maximum specific capacitance of 775 Fg -1 at a current density of 1 Ag -1 and exceptional chemical stability as an electrode material. Antibacterial activities of the synthesized materials were also exhibited against Gram-positive (S. aureus) and Gram-negative (E. coli) bacterial strains.