BiFeO3/Fe2O3 electrode for photoelectrochemical water oxidation and photocatalytic dye degradation: A single step synthetic approach. (September 2022)

• Record Type: Journal Article
• Authors: Koyyada, Ganesh; Goud, Burragoni Sravanthi; Devarayapalli, Kamakshaiah Charyulu; Shim, Jaesool; Vattikuti, S.V. Prabhakar; Kim, Jae Hong
• Is Part Of: Chemosphere. Volume 303:Part 3(2022)
• Publication Date: 2022-09
• Subjects: Perovskite materials -- Photoelectrode -- Energy storage -- Water splitting -- Magnetic materials -- Supercapacitor; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.135071
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Herein, mixed-phase BiFeO3 /Fe2 O3 (BF-M) nanocomposite has been successfully prepared in a simple single-step synthetic strategy and its structural, physicochemical and magnetic properties have been characterized. The performance of as-synthesized mixed-phase BF-M catalyst has been investigated in photoelectrochemical (PEC) water oxidation and photocatalytic dye degradation analysis by comparing with the partials Fe2 O3 with BiFeO3 (BF–P). The BF-M photocatalyst has degraded 95.7% of the rhodamine B (RhB) dye while BF–P has degraded 82.1% in 80 min. In addition, the BF-M electrode exhibited 0.57 mA cm −2 photocurrent density which was 1.83 times higher than the BF–P electrode (0.31 mA cm −2 ), signifying that the formation of a mixed-phase nanostructure interface is advantageous in enhancing light absorption capacity and reducing the rate of electron-hole recombination. Graphical abstract: Image 1 Highlights: Multiphase BiFeO3 /Fe2 O3 (BF-M) nanocomposite has been synthesized in a single step synthesis strategy and its structural, optical, magnetic, and electrochemical properties were compared with BiFeO3 (BF–P). BF-M has been characterized using PXRD and complemented with the theoretically calculated XRD data. BF-M has exhibited 1.83 times higher photocurrent than the BF–P nanocomposite in the PEC water oxidation process. BF-M has shown a higher photocatalytic RhB dye degradation rate of 95.7%, while BF–P degraded 82.1% in 80 min.