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

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 w...

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Bibliographic Details
Published in:Catalysts 2021-10, Vol.11 (10), p.1136
Main Authors: Gabelica, Ivana, Ćurković, Lidija, Mandić, Vilko, Panžić, Ivana, Ljubas, Davor, Zadro, Krešo
Format: Article
Language:English
Subjects:
Adsorption
Catalysts
Chemical reactions
core–shell nanocomposite
Iron oxides
Leaching
Light irradiation
Magnetic cores
Magnetic fields
Magnetic measurement
Magnetite
Microprocessors
microwave synthesis
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Photocatalysis
Photodegradation
Physical properties
silica
Silicon dioxide
Solvents
Synthesis
titania
Titanium dioxide
Vibration
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Summary: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.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal11101136