【作者】 张研； 刘慷恺； 孟龙月； 孟万；

【Author】 ZHANG Yan;LIU Kang-Kai;MENG Long-Yue;MENG Wan;Department of Chemistry,College of Science,Yanbian University;Department of Chemical Engineering and Technology,College of Engineering,Yanbian University;

【机构】 延边大学； 延边大学理学院化学系； 延边大学工学院化工系；

【摘要】 本文以枸杞作为碳源,H₂O₂为氧化剂,采用水热法制备了水溶性枸杞基碳量子点（CQDs）,通过改变反应温度,反应时间,氧化剂浓度、优化了CQDs的合成条件。采用TEM,UV,FL and XPS分析所合成的CQDs的粒径形貌、发光性能,元素种类等。实验结果表明,反应物枸杞/H₂O₂摩尔量比为1/1时,反应温度为180℃,反应时间为7 h时所得到的CQDs的光谱性能最佳,荧光量子产率为16.08%。本实验展示了将CQDs作为双传感器实现Ag⁺的"Turn-off"和GSH的"Turn-on"的动态荧光检测。更多还原

【Abstract】 Water-soluble wolfberry-based carbon quantum dots（CQDs） were prepared by hydrothermal method using wolfberry as carbon source,H₂O₂ as oxidizing agent.The synthesis condition of carbon dots was optimized by changing the reaction time,reaction temperature and oxidant concentration.The wolfberry-based carbon quantum dots（CQDs） were characterized by TEM,UV-visible absorption,fluorescence and XPS spectra.The results showed that wolfberry/H₂O₂ molar ratio 1:1,the reaction temperature 180℃ and reaction time 7 h were the optimal condition of hydrothermal synthesis of CQDs.The fluorescence quantum yield is 16.08%.This study demonstrated "turn-off" dynamic fluorescence-based sensing of Ag⁺ ions and "turn-on" fluorescence-based on sensingof GSH using C-dots as dual-sensor.更多还原