Sunlight driven photo-treatment of polyhydroxybutyrate microplastics mediated by carbon nanodots-doped ZnO mesocrystals: Induced surface changes boost degradation in soil and biofilm formation

Sunlight driven photo-treatment of polyhydroxybutyrate microplastics mediated by carbon nanodots-doped ZnO mesocrystals: Induced surface changes boost degradation in soil and biofilm formation

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Researchers designed ZnO mesocrystals doped with carbon nanodots that could degrade polyhydroxybutyrate (PHB) microplastics under sunlight, inducing surface changes that boosted subsequent biodegradation in soil and promoted biofilm formation. The photocatalytic treatment enhanced the overall degradation rate of this biodegradable polymer.

Nanotechnology-Enhanced Photocatalysis for Microplastic Degradation: A Sustainable Approach

Photocatalytic-Driven Self-Degradation of Polyester Microplastics Under Solar Light

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"Researchers synthesized a polyester fiber modified with a g-C3N4/TiO2 photocatalyst that can self-degrade under solar illumination, achieving near-complete breakdown into CO2 and water after 400 hours of light exposure. Designing plastics that decompose under sunlight rather than fragmenting into persistent microplastics offers a proactive materials-level strategy to reduce the volume of synthetic polymer pollution entering ecosystems."

Manganese oxide-mediated inhibition of microplastic photodegradation: insight into the photoreduction mechanism

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Researchers found that manganese oxides significantly inhibit photodegradation of polystyrene and PVC microplastics by scavenging reactive oxygen species and forming light-shielding complexes, reducing breakdown rates by nearly 58%, challenging the view that minerals accelerate microplastic degradation.

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.