Öztürk Dilek, Durmuş Mahmut
Department of Chemistry, Gebze Technical University, Gebze, Kocaeli, 41400, Turkey.
J Fluoresc. 2024 Jul 19. doi: 10.1007/s10895-024-03844-0.
Pentachlorophenol is a very toxic chemical that is used as a pesticide, fungicide, herbicide, wood preservative, etc., and it should be monitored in terms of human health and environmental production. Another environmental problem is the increase in the use of facemasks, especially during the COVID-19 pandemic. This study provides a value added chemicals to sustainability of recycling process. Fluorescent carbon dots (CDs) were synthesized from waste facemasks and investigated their fluorescence sensor performances. UV-Vis and fluorescence spectra of the synthesized carbon dots were recorded in different organic solvents. The sensor properties of these carbon dots against pesticides were investigated, and a 'turn-off' response was observed toward pentachlorophenol. The limit of detection was found 8.5 µM in the linear range from 43.3 µM to 375 µM. This study showed that waste plastics such as facemasks can be recycled to obtain carbon dots, which are used in different technological areas such as photocatalysis, bioimaging, etc., as well as in sensors.
五氯苯酚是一种剧毒化学品，用作杀虫剂、杀菌剂、除草剂、木材防腐剂等，应从人类健康和环境生产方面对其进行监测。另一个环境问题是口罩使用量的增加，尤其是在新冠疫情期间。本研究为回收过程的可持续性提供了增值化学品。从废弃口罩中合成了荧光碳点，并研究了它们的荧光传感性能。在不同有机溶剂中记录了合成碳点的紫外-可见光谱和荧光光谱。研究了这些碳点对农药的传感特性，观察到对五氯苯酚有“关闭”响应。在43.3 µM至375 µM的线性范围内，检测限为8.5 µM。本研究表明，口罩等废塑料可以回收以获得碳点，这些碳点可用于光催化、生物成像等不同技术领域以及传感器中。
