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Photocatalytic degradation of polyethylene terephthalate nano and microplastics over ilmenite-graphene oxide nanohybrid
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Researchers combined natural ilmenite mineral with graphene oxide to create a photocatalyst that degraded 100% of PET plastic particles in water under UV light, outperforming previous methods. This eco-friendly approach offers a promising tool for removing nanoplastics and microplastics from drinking water without generating harmful byproducts.
Nanoplastics and microplastics (NMPs) significantly threaten ecosystems by accumulating in the environment, harming aquatic organisms, and disrupting food chains. This has led to an increased global demand for a robust and ecologically sustainable solution to mitigate or eliminate NMPs. The present study explores a sustainable method for eliminating NMPs using a nanohybrid composed of natural ilmenite (FeTiO3) and graphene oxide (GO), synthesized via a microwave-assisted route. Using the most common NMP found in drinking water, polyethylene terephthalate (PET), as the model NMP, the adsorption and photocatalytic performances of the nanohybrid were tested across 50–100 ppm concentrations. UV–Vis spectroscopic data showed 34% adsorptive removal, and 100% photocatalytic degradation of PET at 75 ppm solution under UV irradiation. Furthermore, with a first order rate constant of 0.0019 min−1, the photocatalyst shows significantly faster PET degradation kinetics compared to previous reports. The ilmenite-GO nanohybrid proves to be an effective, reusable photocatalyst capable of removing NMPs beyond the European Union’s permissible limit for plastic migration in food containers, offering a promising solution for clean, NMP-free water.
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Tiny plastic particles called micro- and nanoplastics are turning up everywhere, in our oceans, soil, and likely our bodies, raising concerns about long-term health effects. This review rounds up the latest science on using light-activated materials (photocatalysts) to break down these plastic particles, including newer "green" methods made from plants, algae, and bacteria that could make cleanup cheaper and more eco-friendly. While these technologies are still being developed rather than ready for widespread use, they represent a promising direction for tackling plastic pollution at its source.
Research progress on photocatalytic degradation of microplastics by graphitic carbon nitride
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This review systematically examined graphitic carbon nitride (g-C3N4) as a photocatalytic tool for degrading microplastics, identifying hydroxyl radicals, holes, and superoxide radicals as the key reactive species and showing that pH, light intensity, and MP morphology significantly affect degradation efficiency. While still at laboratory scale, photocatalytic degradation offers a chemical pathway to break down persistent microplastics in water—an important complement to physical filtration approaches.
Photocatalytic Degradation of Microplastic in the Environment
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Researchers reviewed photocatalytic degradation as a promising approach for breaking down microplastics in the environment, finding it may offer advantages over incineration and filtration — though practical challenges around scale and efficiency remain.
Photocatalytic Degradation of Macro—and Microplastics Using Titanium Dioxide (TiO₂)
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This review assessed titanium dioxide (TiO2) photocatalysis as a method for degrading macro- and microplastics, finding that UV-activated TiO2 can break polymer chains through reactive oxygen species under controlled conditions. Scalable photocatalytic degradation is a compelling remediation strategy because it can destroy microplastics rather than relocate them, potentially reducing the volume of particles available for human ingestion and environmental accumulation.
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