Comparison of N-doped carbon dots synthesized from the main components of plants including cellulose, lignin, and xylose: Characterized, fluorescence mechanism, and potential applications
Comparison of N-doped carbon dots synthesized from the main components of plants including cellulose, lignin, and xylose: Characterized, fluorescence mechanism, and potential applications
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由纤维素、木质素和木糖等植物主要成分合成的氮掺杂碳点的比较：表征、荧光机制和潜在应用
DOI：
10.1016/j.dyepig.2020.108725
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发表时间：
2020-12-01
影响因子：
4.5
通讯作者：
Liang, Yanglin
中科院分区：
文献类型：
--
作者：
Liao, Xiufen;Chen, Congjin;Liang, Yanglin
在这项研究中，氮掺杂碳量子点（N-CDs）从植物的主要成分，包括纤维素（N-cCDs），木质素（N-ICDs），和木糖（N-xCDs）合成，进行了比较。采用TEM、XRD、FT-IR、XPS等手段对产物的形貌和化学组成进行了表征。结果表明，所制备的3种N-CD均含有氮掺杂的sp（2）和sp（3）杂化碳核，并被含氧和含氮官能团所包围。三种N-CD均表现出一种新颖的双激发-单发射现象，且其荧光均被N掺杂显著增强。此外，本研究表明，高木质素含量的生物质不适合通过水热法生产CD。纤维素有利于生产光盘，但需要较高的温度和较长的时间。富含低分子量碳水化合物的生物质和含氮生物质是较好的碳源。此外，这项研究表明，N-cCD和N-xCD是荧光墨水，织物识别，温度传感和Hg 2+传感的优秀候选者。由于N-ICD的荧光性能较差，不适合用于荧光油墨和织物的识别。
In this study, N-doped carbon dots (N-CDs) synthesized from the main components of plants, including cellulose (N-cCDs), lignin (N-ICDs), and xylose (N-xCDs), were compared. TEM, XRD, FT-IR, and XPS were carried out to characterize their morphology and chemical composition. Results show that the three obtained N-CDs contained N-doped sp(2) and sp(3) hybrid carbon core, which was surrounded by oxygen- and nitrogen-containing functional groups. The three N-CDs exhibited a novel double excitation-one emission phenomenon, and their fluorescence were significantly enhanced by N-doping. Moreover, this study indicated that high lignin-containing biomass is not appropriate for producing CDs by hydrothermal method. Cellulose is conducive to produce CDs, while it needs a relatively high temperature and a long time. Low-molecular carbohydrate-rich biomass and nitrogen-containing biomass is the better carbon source to produce the CDs. Also, this study revealed that N-cCDs and N-xCDs are excellent candidates for fluorescent ink, fabrics identifying, temperature sensing, and Hg2+ sensing. Due to its poor fluorescence property, N-ICDs is not suitable for fluorescent ink and fabrics identification.