Green Synthesis of Fluorescent Nitrogen-Sulfur Co-Doped Carbon Dots from Scallion Leaves for Hemin Sensing
Green Synthesis of Fluorescent Nitrogen-Sulfur Co-Doped Carbon Dots from Scallion Leaves for Hemin Sensing
复制标题
大葱叶绿色合成荧光氮硫共掺杂碳点用于氯化血红素传感
DOI：
10.1080/00032719.2020.1716782
复制
发表时间：
2020
影响因子：
2
通讯作者：
Zhou Dan
中科院分区：
文献类型：
--
作者：
Zhang Zhenhu;Hu Bin;Zhuang Qianfen;Wang Yong;Luo Xubiao;Xie Yu;Zhou Dan
The nitrogen–sulfur co-doped carbon dots (CDs) were synthesized using scallion leaves via an environmentally friendly and facile hydrothermal method, which did not require surface passivating agents. When the hemin concentration was increased from 0.5 to 10.0 μM, the fluorescence emission intensity of the CDs was also linearly quenched. The detection limit was estimated to be 0.1 μM. The fluorescence sensing mechanism was systematically explored by a series of characterization methods. The results revealed that the fluorescence sensing quenching mechanism was ascribed to the inner filter effect and photo-induced electron transfer. The proposed mechanism was further verified by our theoretical calculations. The proposed sensor was successfully applied for the determination of hemin in human serum samples.
