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Sustainable photoelectrocatalytic oxidation of antibiotics using Ag-CoFeO@TiO heteronanostructures for eco-friendly wastewater remediation. | LitMetric

Sustainable photoelectrocatalytic oxidation of antibiotics using Ag-CoFeO@TiO heteronanostructures for eco-friendly wastewater remediation.

Chemosphere

Department of Physics & Nanotechnology, SRM University of Science and Technology, Kattankulathur, Chennai, 603203, Tamil Nadu, India. Electronic address:

Published: August 2024

AI Article Synopsis

Article Abstract

Developing high-performance and durable catalysts presents a significant challenge for oxidizing toxic inorganic and pharmaceutical compounds in wastewater. Recently, there has been a surge in the development of new heterogeneous catalysts for degrading pharmaceutical compounds, driven by advancements in electrocatalysts and photoelectrocatalysts. In this study, a plasmonic Ag nanoparticles decorated CoFeO@TiO heteronanostructures have been successfully designed to fabricate a high-performing photoelectrode for the oxidation of pharmaceutical compounds. The developed Ag-CoFeO@TiO possessed a higher electrochemical stability and effectively harvested the UV to visible and NIR radiation in sunlight which generates the enormous photochemical reactive species that involved in the oxidation of ibuprofen in wastewater. Under direct sunlight irradiation, Ag-CoFeO@TiO achieved complete oxidation of ibuprofen in wastewater at 0.8 V vs RHE. This indicates that metallic Ag nanoparticles are involved in the charge separation and transport of charge carriers from the photoactive sites of CoFeO@TiO, promoting the generation of abundant hydroxy, oxy, and superoxide radicals that actively break the bonds of ibuprofen. Additionally, oxidation agents such as urea and HO were utilized to enhance the formation of superoxide ions and hydroxyl radicals, which rapidly participate in the oxidation of ibuprofen. Significantly, testing for recyclability confirmed the stability of the Ag-CoFeO@TiO photoanode, ensuring its suitability for prolonged use in photoelectrochemical advanced oxidation processes. Integrating Ag-CoFeO@TiO photoanodes into water purification systems could enhance economic feasibility, reduce energy consumption, and improve efficiency.

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http://dx.doi.org/10.1016/j.chemosphere.2024.142736DOI Listing

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