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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 \u2018turn-off\u2019 response was observed toward pentachlorophenol. The limit of detection was found 8.5 \u00b5M in the linear range from 43.3 \u00b5M to 375 \u00b5M. 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.<\/jats:p>\n          <jats:p>\n            <jats:bold>Graphical Abstract<\/jats:bold>\n          <\/jats:p>","DOI":"10.1007\/s10895-024-03844-0","type":"journal-article","created":{"date-parts":[[2024,7,19]],"date-time":"2024-07-19T08:01:46Z","timestamp":1721376106000},"page":"4453-4465","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Utilizing Carbon Dots Derived from Waste Face Masks for Pentachlorophenol Detection"],"prefix":"10.1007","volume":"35","author":[{"given":"Dilek","family":"\u00d6zt\u00fcrk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahmut","family":"Durmu\u015f","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,7,19]]},"reference":[{"key":"3844_CR1","doi-asserted-by":"publisher","first-page":"322","DOI":"10.1016\/j.carbon.2020.06.024","volume":"167","author":"H Ding","year":"2020","unstructured":"Ding H, Zhou X-X, Wei J-S, Li X-B, Qin B-T, Chen X-B, Xiong H-M (2020) Carbon dots with red\/near-infrared emissions and their intrinsic merits for biomedical applications. 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