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Article

Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin

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Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
2
Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia
3
Faculty of Natural Sciences, University of Zagreb, 10000 Zagreb, Croatia
*
Authors to whom correspondence should be addressed.
Academic Editors: Laura Bergamonti and Pier Paolo Lottici
Catalysts 2021, 11(10), 1136; https://doi.org/10.3390/catal11101136
Received: 20 August 2021 / Revised: 17 September 2021 / Accepted: 20 September 2021 / Published: 22 September 2021
(This article belongs to the Special Issue Photocatalytic Activity of TiO2 and Its Applications)
In this work, magnetic nanoparticles based on magnetite were successfully prepared via rapid microwave-assisted synthesis. In order to obtain the ternary core–shell Fe3O4/SiO2/TiO2 nanocomposite, first magnetite (Fe3O4) nanoparticles were coated with a protective layer of silica (SiO2) and finally with titania (TiO2). The composite configuration comprising porous and photoactive shells should facilitate the removal of organic micropollutants (OMPs) from water. Furthermore, the magnetic core is critical for processing the management of the photocatalytic powder suspension. The magnetization of the prepared magnetic nanoparticles was confirmed by vibrating-sample magnetometry (VSM), while the structure and morphology of the core–shell nanocomposite were investigated by means of XRD, FTIR, and SEM. Adsorption and photocatalysis were evaluated by investigating the removal efficiency of ciprofloxacin (CIP) as a model OMP using the prepared magnetic core–shell nanocomposite under UV-A light irradiation. It was found that the Fe3O4/SiO2/TiO2 nanocomposite showed good synergistic adsorption and photocatalytic properties. The measurement of iron in eluate confirmed that no leaching occurred during the photocatalytic examination. The recovery of magnetic nanocomposite by an external magnetic field confirmed that the magnetically separated catalyst is highly suitable for recycling and reuse. View Full-Text
Keywords: microwave synthesis; magnetite; silica; titania; core–shell nanocomposite microwave synthesis; magnetite; silica; titania; core–shell nanocomposite
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MDPI and ACS Style

Gabelica, I.; Ćurković, L.; Mandić, V.; Panžić, I.; Ljubas, D.; Zadro, K. Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin. Catalysts 2021, 11, 1136. https://doi.org/10.3390/catal11101136

AMA Style

Gabelica I, Ćurković L, Mandić V, Panžić I, Ljubas D, Zadro K. Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin. Catalysts. 2021; 11(10):1136. https://doi.org/10.3390/catal11101136

Chicago/Turabian Style

Gabelica, Ivana, Lidija Ćurković, Vilko Mandić, Ivana Panžić, Davor Ljubas, and Krešo Zadro. 2021. "Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin" Catalysts 11, no. 10: 1136. https://doi.org/10.3390/catal11101136

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