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

Scientific paper - Original scientific paper

• Author: Ivana Gabelica
• Author: Lidija Ćurković
• Author: Vilko Mandić
• Author: Ivana Panžić
• Author: Davor Ljubas
• Author: Krešo Zadro
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): microwave synthesis; magnetite; silica; titania; core–shell nanocomposite
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Catalysts
• Numbering: vol. 11, no. 10, 1136
• e-ISSN: 2073-4344
• DOI: https://doi.org/10.3390/catal11101136
• URN:NBN: urn:nbn:hr:217:285676
• Publication: 2021-09-22
• Project: Number: IP-2016-06-6000; Title (croatian): Napredna monolitna i kompozitna keramika za zaštitu od trošenja i korozije; Acronym: WECOR; Leader: Lidija Ćurković; Jurisdiction: Croatia; Funding stream: Research Projects
• Project: Number: UIP-2019-04-2367; Title (croatian): Fenomeni na površini tijekom priprave naprednih nanokompozita infiltracijom i funkcionalizacijom poroznih materijala; Title (english): Surface limitations in preparing and infiltration of hard porous nanomaterial by soft or liquid precursors for performance enhancing; Acronym: SLIPPERYSLOPE; Leader: Vilko Mandić; Jurisdiction: Croatia; Funding stream: Installation Research Projects
• Document URL: https://www.mdpi.com/2073-4344/11/10/1136
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Received: 20 August 2021. Accepted: 20 September 2021. Published: 22 September 2021.
• Created on: 2024-09-14 20:17:03