Magnetic recyclable α-Fe2O3–Fe3O4/Co3O4–CoO nanocomposite with a dual Z-scheme charge transfer pathway for quick photo-Fenton degradation of organic pollutants.

Khaled, Alkanad and Abdo, Hezam and Sujay Shekar, G. C. and Drmosh, Q. A. and Amrutha Kala, A. L. (2021) Magnetic recyclable α-Fe2O3–Fe3O4/Co3O4–CoO nanocomposite with a dual Z-scheme charge transfer pathway for quick photo-Fenton degradation of organic pollutants. Catalysis Science and Technology, 11. pp. 3084-3097.

PDF Catal. Sci. Technol., 2021, 11, 3084–3097.pdf - Published Version Restricted to Registered users only Download (7MB) | Request a copy

Abstract

The integration of multiple degradation pathways in a single catalyst is a potential approach to advance the technologies of organic pollutant degradation. To integrate both the heterogeneous photo-Fenton reaction and Z-scheme configuration in a single catalyst, a novel magnetic separable α-Fe2O3–Fe3O4/ Co3O4–CoO nanocomposite enriched with oxygen vacancies is fabricated via the solution combustion method by optimizing the fuel and nitrate ion concentration. The Z-scheme configuration along with oxygen vacancies contributes to in situ H2O2 generation and simultaneous reactivation with high H2O2 performance, which is required for the photo-Fenton process. Oxygen vacancies facilitate the charge carrier transfer in the Z-scheme system and promote interfacial electronic transmission involved in the redox cycle from CoIII/FeIII to CoII/FeII, inducing the generation of ˙O2 − , 1 O2, ˙SO4 − and ˙OH radicals. Consequently, the transcendental catalyst exhibits excellent photo-Fenton photocatalytic features facilitating highly improved pollutant degradation under sunlight irradiation and Fenton reaction promoting the degradation in the dark as well. The photodegradation rate is enhanced 5.33 times and 3.6 times in the presence of H2O2 and persulfate, respectively. This study opens the possibility of designing a single catalyst with different degradation mechanisms

Item Type:	Article
Uncontrolled Keywords:	organic pollutant degradation, magnetic separable, Z-scheme configuration
Subjects:	500 Natural Sciences and Mathematics > 05 Earth Sciences > 03 Environmental Sciences
Divisions:	Food Safety Analytical Quality Control Lab
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	16 May 2023 04:23
Last Modified:	16 May 2023 04:23
URI:	http://ir.cftri.res.in/id/eprint/16351

Actions (login required)

View Item