Song Haoqiang, Liu Xuejian, Wang Boyang, Tang Zhiyong, Lu Siyu
College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450001, China; CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
Sci Bull (Beijing). 2019 Dec 15;64(23):1788-1794. doi: 10.1016/j.scib.2019.10.006. Epub 2019 Oct 14.
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.
塑料垃圾通常耐自然降解，已成为全球主要的环境污染问题。生态系统的污染严重影响包括人类在内的生物的健康和生存。人们已高度关注寻找将塑料垃圾转化为高附加值碳材料的合适方法。为此，我们报告了以废弃的发泡聚苯乙烯为前驱体，通过一步溶剂热法获得用于固态荧光（SSF）的高产率（60%-85%）碳点（CDs）。还探究了CDs的SSF机制。它们的发射波长半高宽达150-200纳米，呈现出从白色到黄色和橙色的可调光致发光。CDs粉末被用于在紫外芯片上制造单组分白色和多色发光二极管。总体而言，通过一种简单的溶剂热法，塑料垃圾被转化为具有可调性的固态荧光CDs粉末，这在碳基照明方面有广阔应用前景，为塑料垃圾回收提供了一种可行方法。
