Al-Sharabi, M., Baiocco, D., Lobel, B.T. orcid.org/0000-0003-0472-6362 et al. (3 more authors) (2024) Magnetic zinc oxide/silica microbeads for the photocatalytic degradation of azo dyes. Colloids and Surfaces A Physicochemical and Engineering Aspects, 695. 134169. ISSN 0927-7757
Abstract
Photocatalysis is a promising technique for the complete degradation of azo dyes that are present in wastewater. In this work, a new photocatalyst in the form of ZnO/Fe₃O₄/SiO₂ hybrid microbeads was fabricated for the photocatalytic degradation of methylene blue. The microbeads were synthesised through self-assembly and subsequent agglomeration of nanoparticles within an aqueous phase of a water-in-oil emulsion template. Photocatalytic degradation experiments were conducted through exposure of a methylene blue solution to UV light. The hybrid microbeads performed better than ZnO powder at the same initial dye and ZnO concentration because of higher adsorption and degradation. The initial concentration of dye solution and catalyst dosage have a significant impact on the degradation. Higher degradation is seen with lower initial dye concentration and higher catalyst dosage. The presence of magnetic nanoparticles within the beads allows for their full recovery and reuse for degradation experiments. Complete degradation of dye was achieved using the new ZnO/Fe₃O₄/SiO₂ microbeads.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Magnetic zinc oxide/silica microbeads; Nanoparticles; Azo dyes; Methylene blue; Photocatalytic degradation; Wastewater treatment |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Jan 2025 14:32 |
Last Modified: | 24 Jan 2025 14:32 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.colsurfa.2024.134169 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:222244 |