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Peer reviewed
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Song, Haoqiang; Liu, Xuejian; Wang, Boyang; Tang, Zhiyong; Lu, Siyu
Science bulletin (Beijing), 12/2019, Volume: 64, Issue: 23Journal Article
A high production yield CDs was synthesized by waste plastic (polystyrene) with a large full width at half maximum of 150–200 nm, exhibited tunable photoluminescence from white to yellow and orange. CDs powder was used to fabricate single-component white and multi-color light-emitting diodes on UV chips. This investigation not only proves that solid-state fluorescent CDs have broad application prospects, but also provides a feasible method for recycling plastic waste. Display omitted Plastic waste is generally resistant to natural degradation and has become a major environmental pollution problem globally. The pollution of ecosystems seriously affects the health and survival of organisms, including humans. Much attention has been paid to finding suitable ways to convert plastic waste into high-value-added carbon materials. To this end, we report the high production yield (60%–85%) of carbon dots (CDs) for solid-state fluorescence (SSF) obtained by a one-step solvothermal method using waste expanded polystyrene as the precursor. The SSF mechanism of the CDs was also explored. Their emission wavelength, with a large full width at half maximum of 150–200 nm, exhibited tunable photoluminescence from white to yellow and orange. CDs powder was used to fabricate single-component white and multi-colour light-emitting diodes on UV chips. Overall, plastic waste was converted into tunable solid-state fluorescent CDs powder, which has promising applications in carbon-based lighting, by a simple solvothermal method that provides a viable method for recycling plastic waste.
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