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PMA-FeCo mixed-oxide magnetic quasi-nanosheets
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This study synthesized two-dimensional iron-cobalt oxide magnetic nanosheets with potential applications in environmental sensing and remediation. The magnetic properties of these materials could be exploited for removing contaminants including microplastics from water.
Free-standing 2D nanoassemblies are a new class of advanced functional materials that can integrate the unique properties of their individual components. Herein, we report a facile template-free solvothermal strategy to manipulate the assembly of structurally distinct building blocks into free-standing 2D quasi-nanosheets. The obtained 2D nanoassemblies are magnetic in nature with thickness in the range of tens of nanometers and lateral dimensions of several micrometers. They showed exceptionally high stability and can even remain intact in any solvent for months without any significant disassembly. The magnetic quasi-nanosheets were further used to remove polystyrene (PS), a model microplastic pollutant, from water. The robust phosphomolybdic acid (PMA) cluster-based hybrid exhibited outstanding PS removal performance because of the unique quasi-nanosheet architecture and multiple coordination sites of the redox-active PMA clusters. Overall, our developed co-assembly and subsequent water purification strategy effectively tackles various limitations associated with traditional assembly and water purification strategies.
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Researchers synthesized soft magnetic FeCo alloy nanoparticles loaded onto carboxymethyl cellulose and systematically characterized their ability to adsorb polyethylene microplastics from water, finding effective magnetic-assisted removal that could be applied for environmental microplastic remediation.
Remediation strategies for micro/nanoplastic pollution using magnetic nanomaterials
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This review surveys recent developments in using magnetic nanomaterials, such as iron oxide nanoparticles and magnetic composites, to remove micro- and nanoplastics from water and soil. These materials can capture plastic particles through adsorption, help clump them together for removal, or even break them down, and they can be magnetically recovered for reuse. The study highlights that magnetic nanomaterials offer a promising approach for cleaning up plastic pollution, though challenges remain in scaling up for real-world use.
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Researchers developed ultra-thin magnetic iron oxide nanodiscs for removing micro- and nanoplastics from water. The study found that these nanodiscs achieved high adsorption capacity through electrostatic and magnetic forces, and maintained over 90% removal efficiency after five reuse cycles, offering a cost-effective approach for treating plastic-contaminated wastewater.
Surface-engineered anisotropic Fe3O4 nanoplates for highly efficient magnetic field-assisted micro/nanoplastics remediation
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Researchers developed surface-engineered anisotropic magnetite (Fe3O4) nanoplates coated with SiO2 for highly efficient magnetic field-assisted removal of micro- and nanoplastics from aqueous environments. The anisotropic nanoplate architecture provided greater surface area and improved magnetic responsiveness compared to conventional spherical particles, enabling efficient capture and separation of plastic particles across a range of sizes and polymer types.
Synthesis, assessment, and application of two-dimensional ferromagnetic nanocomposites for the removal of microplastics from drinking water and wastewater effluent
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Researchers synthesized ferromagnetic 2D nanocomposites and evaluated their effectiveness at removing microplastics from drinking water and wastewater effluent, finding they offer a promising technological innovation for addressing MP contamination in water treatment systems.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.