Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> 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 Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> nanocomposite, first magnet...
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MDPI AG
2021-09-01
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| Online Access: | https://www.mdpi.com/2073-4344/11/10/1136 |
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| author | Ivana Gabelica Lidija Ćurković Vilko Mandić Ivana Panžić Davor Ljubas Krešo Zadro |
| author_facet | Ivana Gabelica Lidija Ćurković Vilko Mandić Ivana Panžić Davor Ljubas Krešo Zadro |
| author_sort | Ivana Gabelica |
| collection | DOAJ |
| description | In this work, magnetic nanoparticles based on magnetite were successfully prepared via rapid microwave-assisted synthesis. In order to obtain the ternary core–shell Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> nanocomposite, first magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles were coated with a protective layer of silica (SiO<sub>2</sub>) and finally with titania (TiO<sub>2</sub>). 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 Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> 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. |
| first_indexed | 2024-03-10T06:40:05Z |
| format | Article |
| id | doaj.art-02f85d2cc6ef4ed0a70253ef6e106f25 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T06:40:05Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-02f85d2cc6ef4ed0a70253ef6e106f252023-11-22T17:42:45ZengMDPI AGCatalysts2073-43442021-09-011110113610.3390/catal11101136Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of CiprofloxacinIvana Gabelica0Lidija Ćurković1Vilko Mandić2Ivana Panžić3Davor Ljubas4Krešo Zadro5Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Natural Sciences, University of Zagreb, 10000 Zagreb, CroatiaIn this work, magnetic nanoparticles based on magnetite were successfully prepared via rapid microwave-assisted synthesis. In order to obtain the ternary core–shell Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> nanocomposite, first magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles were coated with a protective layer of silica (SiO<sub>2</sub>) and finally with titania (TiO<sub>2</sub>). 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 Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> 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.https://www.mdpi.com/2073-4344/11/10/1136microwave synthesismagnetitesilicatitaniacore–shell nanocomposite |
| spellingShingle | Ivana Gabelica Lidija Ćurković Vilko Mandić Ivana Panžić Davor Ljubas Krešo Zadro Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin Catalysts microwave synthesis magnetite silica titania core–shell nanocomposite |
| title | Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin |
| title_full | Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin |
| title_fullStr | Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin |
| title_full_unstemmed | Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin |
| title_short | Rapid Microwave-Assisted Synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin |
| title_sort | rapid microwave assisted synthesis of fe sub 3 sub o sub 4 sub sio sub 2 sub tio sub 2 sub core 2 layer shell nanocomposite for photocatalytic degradation of ciprofloxacin |
| topic | microwave synthesis magnetite silica titania core–shell nanocomposite |
| url | https://www.mdpi.com/2073-4344/11/10/1136 |
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