Qu, S. orcid.org/0009-0009-9064-2325, Ma, R., Efimov, I. et al. (3 more authors) (2025) Understanding and tuning Fe‐doping on Zn–Fe layered double hydroxide particle and photocatalytic properties. Advanced Energy and Sustainability Research. ISSN 2699-9412
Abstract
Zn-based layered double hydroxides (LDHs) are promising photocatalytic materials, but their synthesis faces environmental and economic challenges. Oxidative ionothermal synthesis (OIS) offers a green route for zinc oxide synthesis using ionic liquids. To reduce costs, the OIS method uses recovered zinc-containing mixed metal systems, such as electric arc furnace dust, instead of pure metallic Zn. Understanding the interaction of Zn with impure metals during oxidation is essential. This study employs 1-Butyl-3-methylimidazolium chloride ([BMIM]Cl) as the solvent and Fe-doped metallic Zn, the most common waste-stream metal, as the starting material. This study applies quartz crystal microbalance with dissipation to monitor product formation, and X-ray diffraction and scanning electron microscopy to characterize composition and morphology. Results show that FeCl2 doping accelerates the reaction, transforming simonkolleite to Zn–Fe LDH with tunable morphologies. A reaction mechanism for Zn in [BMIM]Cl with FeCl2 is proposed. Photocatalytic hydrogen production tests reveal a favorable hydrogen evolution rate of 20.9 μmol h−1 g−1 with 0.45 M FeCl2 doping, attributed to improved surface structure and crystallinity of the hydrotalcite.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | ionic liquids; layered double hydroxides; photocatalysis; oxidative ionothermal synthesis; zinc corrosion |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 29 Jan 2025 16:29 |
Last Modified: | 29 Jan 2025 16:29 |
Published Version: | https://doi.org/10.1002/aesr.202400309 |
Status: | Published online |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/aesr.202400309 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:222382 |