Aparicio Rosinaldo Rabelo, de Lima Gabriel Goetten, Perissutti Gisele Eliane, Bassi Maiara de Jesus, Jacumazo Joslaine, Schiavon Marco Antônio, Roman Lucimara Stolz, de Muniz Graciela Ines Bolzon, Magalhães Washington Luiz Esteves, Gonzalez de Cademartori Pedro Henrique
Materials Science and Engineering Program (PIPE), Federal University of Paraná, Polytechnic Center, Curitiba 81531-990, Brazil.
Federal Institute Catarinense, São Francisco do Sul 89240-000, Brazil.
ACS Omega. 2025 Mar 12;10(11):11054-11062. doi: 10.1021/acsomega.4c09764. eCollection 2025 Mar 25.
This study presents a simple and cost-effective approach for synthesizing pyrolytic lignin-based carbon dots (CDPLs) via controlled thermal pyrolysis in water. To the best of our knowledge, this is the first time that pyrolytic lignin has been used as a precursor for carbon dots. The one-pot method produced blue/green fluorescent CDPLs with an average size of 34 nm and a negative surface charge of -10.4 mV. The characterization techniques revealed the optical properties and chemical composition of CDPLs, with a fluorescence quantum yield of 7.9%, which is comparable to those of lignin-derived carbon dots. The decay lifetime of CDPLs was in the nanosecond range, which is typical for carbon dots. This study demonstrates the potential of using pyrolytic lignin, a lignocellulosic byproduct, to produce carbon dots through a simple and reproducible method, contributing to the development of sustainable carbon-based nanomaterials.
本研究提出了一种简单且经济高效的方法，通过在水中进行受控热解来合成基于热解木质素的碳点（CDPLs）。据我们所知，这是首次将热解木质素用作碳点的前驱体。这种一锅法制备出了平均尺寸为34 nm且表面带 -10.4 mV负电荷的蓝/绿色荧光CDPLs。表征技术揭示了CDPLs的光学性质和化学组成，其荧光量子产率为7.9%，与木质素衍生的碳点相当。CDPLs的衰减寿命在纳秒范围内，这是碳点的典型特征。本研究证明了利用木质纤维素副产品热解木质素，通过简单且可重复的方法制备碳点的潜力，有助于可持续碳基纳米材料的开发。
