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微波辅助荧光碳量子点制备及其在防伪墨水中应用 被引量:5

Microwave-Assisted Synthesis of S, N-codoped Carbon Dots with Strong Emission and Application as Anti-counterfeit Ink
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摘要 采用快速、绿色的合成方法制备荧光碳量子点纳米材料,并将其应用于新型荧光防伪墨水的构建中。以柠檬酸和N-乙酰半胱氨酸为反应原料,采用微波辅助绿色合成,制备具有荧光发射的硫、氮掺杂碳量子点(S, N-CDs);并利用紫外—可见吸收光谱、荧光光谱等对制备的碳量子点的光谱特性进行表征,采用透射电子显微镜、元素分析仪对产物的微观结构形貌和元素组成进行表征。产物具有良好的水溶性、分散性及强烈的荧光发射。实验中对反应物溶液的配比、微波辐射的时间进行优化,确定了最佳反应条件:柠檬酸和N-乙酰半胱氨酸的浓度分别为200.0 mg/mL和130.4 mg/mL,微波辐射反应时间为5分钟。制备的碳量子点溶液具有发光稳定,安全无毒的特点,可作为荧光探针用于构建新型荧光防伪墨水。 Microwave-assisted irradiation method is a rapid and green synthetic way that has been used to prepare S, N-codoped carbon dots(S, N-CDs). Its products have been employed as a fluorescent anti-counterfeiting ink. The asprepared fluorescent nanomaterial is water-soluble, dispersive and strongly emissive, due to the doping of sulfur, nitrogen and the superheating and non-thermal effects of the microwave energy. The ideal experimental conditions including ratio of reactants and the heating time have been investigated in detail. The as-synthesized carbon dot is well characterized by UVvis spectroscopy, fluorescence spectroscopy, transmission electron microscopy and elemental analyzer to reveal its optical features, microstructure and elemental composition. Furthermore, with the advantages of the simple preparation process and significant fluorescent property and stability, the proposed S, N-CDs solution might be used in preparation of fluorescent probes for the fabrication of anti-counterfeit inks.
作者 颜磊 喻彦林 YAN Lei;YU Yan-lin(School of Criminal Investigation,Southwest University of Political Science and Law Chongqing 401120;Forensic Science Engineering Research Center of Universities in Chongqing Chongqing 401120)
出处 《中国刑警学院学报》 2018年第6期112-116,共5页 Journal of Criminal Investigation Police University of China
基金 重庆市社会科学规划项目(编号:2015PY39) 国家自然科学基金项目(编号:51401174) 重庆市技术创新与应用示范项目(编号:cstc2018jscx-msyb0456)
关键词 碳量子点 N-乙酰半胱氨酸 微波合成 荧光防伪 防伪墨水 Carbon dots N-Acetyl-cysteine Microwave synthesis Fluorescent anti-counterfeit Anti-counterfeit ink
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