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Updated: Sep 13, 2025
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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
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Magnetic Separation of Oil Spills from Water Using Cobalt Ferrite Nanoparticles with Fluorocarbon Functionalization
Aljoša Košak1, Ajra Hadela2, Mojca Poberžnik2
1Faculty of Mechanical Engineering, Center for Sensor Technology, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
International Journal of Molecular Sciences
|July 29, 2025
Summary
Superhydrophobic fluorocarbon-coated cobalt ferrite magnetic nanoparticles were synthesized for efficient removal of synthetic engine oil from water. These reusable nanoparticles demonstrate high adsorption capacity and desorption efficiency, offering a promising solution for oil spill remediation.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Engineering
Background:
- Development of advanced magnetic nanoparticles for environmental remediation.
- Need for effective and reusable adsorbents for oil spill cleanup.
- Exploration of surface modification techniques to enhance adsorbent properties.
Purpose of the Study:
- To synthesize and characterize fluorocarbon-coated cobalt ferrite (CoFe2O4) magnetic nanoparticles.
- To evaluate the superhydrophobic properties and oil adsorption capabilities of these nanoparticles.
- To assess the reusability of the synthesized magnetic adsorbents for oil removal.
Main Methods:
- Synthesis of CoFe2O4 nanoparticles coated with various fluoroalkoxysilanes (TFPTMS, NFHTMS, PFDTES).
- Characterization using X-ray diffractometry (XRD), transmission electron microscopy (TEM), FTIR, BET, and VSM.
- Contact angle measurements for surface hydrophobicity assessment and oil adsorption/desorption tests.
Main Results:
- PFDTES-coated CoFe2O4 nanoparticles exhibited superhydrophobic character with a contact angle of 159.2°.
- High oil adsorption efficiency (87-98%) and capacity (up to 3.1 g/g) were achieved, correlating with oleophobicity.
- Successful multiple adsorption/desorption cycles with 77-97% oil recovery, demonstrating adsorbent reusability.
Conclusions:
- Fluorocarbon-coated CoFe2O4 magnetic nanoparticles are effective superhydrophobic adsorbents for synthetic engine oil removal.
- The synthesized nanoparticles offer high adsorption capacity and can be reused, indicating their potential for environmental applications.
- Surface modification with fluoroalkoxysilanes significantly enhances oil removal performance and adsorbent recyclability.
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