Researchers develop highly-efficient, non-toxic method to upcycle single-useplastic
nto valuable materials is crucial to mitigate these effects. Herein, we report a facile, single-step, and organic solvent-free hydrothermal process to convert polyethylene-based plastic bags and polypropylene-based surgical masks into carbon dots with a 96% production yield.
The produced CDs are soluble in aqueous and various organic solvents, show excitation-dependent emission consistent with their size of 1–8 nm and exhibit thermal and photostability. We further show how this oxidative degradation approach can upcycle contaminated plastics with organic waste, which is a major challenge with plastic recycling. Finally, we demonstrate a potential use case of CDs as anticounterfeiting agents using fluorescent, stretchable films of CD-doped polydimethylsiloxane .
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