Electrochemical and Photocatalytic Applications of Silver-doped Cobalt Ferrite Anchored on Graphene Sheets
Recent Trends in Chemical and Material Sciences Vol. 7,
7 March 2022
The current study describes the synthesis of anAg-CoFe2O4/rGO nanocomposite as a photocatalyst via a hydrothermal process that involves the attachment of silver and cobalt ferrite (CoFe2O4) nanoparticles to the surface of reduced graphene oxide. Various analytical techniques are used to investigate the effect of Ag and reduced graphene oxide (rGO) on the structure, optical, magnetic, photocatalytic, and electrochemical performance of CoFe2O4. The results show that the graphene sheets are exfoliated and decorated with well-dispersed Ag and CoFe2O4 nanoparticles. UV-visible spectra show a gradual shift in the absorption edge towards higher wavelengths with the addition of Ag ions, indicating variation in the samples' energy gap. The photoluminescence results show that graphene can reduce electron-hole recombination and improve the photocatalytic activity of the Ag-CoFe2O4/rGO nanocomposite. In this sense, theAg-CoFe2O4/rGO sample exhibits superior catalytic activity to the CoFe2O4 and Ag-CoFe2O4 photocatalysts for the degradation of methylene blue (MB) dye, indicating that rGO plays an important role in the Ag-CoFe2O4/rGO nanocomposite. The deterioration rate of the samples is found in the order of CoFe2O4(78.03%) <Ag-CoFe2O4(83.04%) < Ag-CoFe2O4/rGO(93.25%) in 100 min for MB dye respectively, under visible light irradiation. M-H hysteresis loop measurements confirm the samples' room temperature ferromagnetic behaviour. Overall, the Ag-CoFe2O4/rGO nanocomposite appears to be a strong magnetic photocatalyst for the treatment of contaminated wastewater. The electrochemical performance of all samples was examined using cyclic voltammetry (CV), which reveals that the Ag-CoFe2O4/rGO nanocomposite outperforms the other samples in terms of rate performance and cycle stability.
- Carbon materials
- Magnetic materials