单 位：
南京林业大学江苏省制浆造纸科学与技术重点实验室南京林业大学江苏省林业资源高效加工利用协同创新中心
关键词：
木质素;碳点;石墨烯量子点;一锅法;两步法;激发依赖发光
摘 要：
碳点(CDs)和石墨烯量子点(GQDs)由于结构稳定、环境友好、水分散性和生物相容性良好、易于功能化改性和可光致发光等优点已成为备受关注的零维碳纳米材料,有望广泛应用于生化指示、生物医学、储能、显示器件和催化等前沿领域。近年来,相比于传统的化石燃料基化合物,来自可再生生物质的木质素及其衍生物不仅价廉易得、活性基团丰富,而且具有天然芳香结构,已成为CDs和GQDs的重要前驱体。但是,已有报道对木质素的解聚机制认识不足,这也逐渐成为制约木质素基CDs和GQDs性能提升的瓶颈之一。因此,必须阐明木质素在相关工艺过程中发生解聚的化学本质,并明确杂原子掺杂与木质素基CDs和GQDs的激发依赖发光行为的内在联系。笔者首先介绍了木质素基CDs和GQDs的制备方法发展历程和潜在应用,同时对其结构和性质等进行评述,重点讨论并总结了制备具有出色激发依赖发光行为的木质素基CDs和GQDs的技术难点,认为开发一类适用于普遍性木质素原料的高效环保解聚策略,以及揭示木质素基CDs和GQDs的杂原子掺杂与其激发依赖发光行为的关联机理将成为该领域今后的重点研究方向。
译 名：
Research progress on the preparation of lignin-derived carbon dots and graphene quantum dots
作 者：
WANG Ruibin;ZHOU Xuelian;XU Tingting;BIAN Huiyang;DAI Hongqi;Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University;
关键词：
lignin;;carbon dots(CDs);;graphene quantum dots(GQDs);;one-pot method;;two-step method;;excitationdependent emission
摘 要：
Carbon dots( CDs) and graphene quantum dots( GQDs) are two kinds of the most attractive zero-dimensional carbon nanomaterials due to their structural stability,environmental benignancy,good aqueous dispersity,biocompatibility,easy processability and extraordinary photoluminescence. Bestowed with these excellent performances,CDs and GQDs are expected to be promisingly widely applied in many emerging fields including physiochemical profiling,biomedicine,energy storage,display devices and catalysis,etc. Recently,there has been a growing trend of employing renewable biomass-based lignin and its derivatives as precursors for CDs and GQDs. In contrast to the conventional non-renewable fossil fuel derived compounds that may bring environmental issues,lignin is not only inexpensive,but also rich in functional groups and intrinsic aromatic rings. However,the well development of the ligninderived CDs and GQDs is seriously hindered,because the mechanistic insights on the lignin depolymerization chemistry during the processing is seriously limited. In this case,it is highly demanded to investigate the related chemical pathways,especially considering the cleavages of the interunit carbon-carbon bonds inside lignin,as well as to unveil the intrinsic connection between the heteroatom doping and excitation-dependent emission behavior of the reported ligninderived CDs and GQDs,thus meeting the performance requirements of different applications. At first,the research progress of preparation methods and potential applications relates to the lignin-derived CDs and GQDs is reviewed in detail,along with their corresponding structures and properties. Particularly,the technical difficulties in fabricating the lignin-derived CDs and GQDs with outstanding excitation-dependent emission behavior are carefully addressed and summarized. Overall,in this study,the environmentally friendly and versatile strategy for the depolymerization of lignin that is effective to most lignin feedstocks is developed,and the correlation mechanism between the heteroatomic doping of lignin-based CDs and GQDs and its excitation-dependent luminescence behavior is also presented,which are anticipated to be the hot topics of the material science community in the near future.
