发光碳量子点的制备及其荧光特性的研究

Synthesis of Photoluminescent Carbon Dots and the Research of Their Fluorescence Properties

本文选取水热法制备了具有优良光学性能的碳量子点(CDs),并对其进行了以下研究:研究了离子种类和浓度分别对碳量子点荧光信号的影响,并对其谱图进行了讨论。研究结果表明:采用水热法,以柠檬酸为碳源与尿素反应可得到具有荧光性的碳量子点。在所研究的无机盐离子中,铜离子对碳量子点的荧光性有明显的猝灭效应,且铜离子浓度与碳量子点的荧光强度成线性负相关关系。由于CDs的荧光信号对于特定的离子有灵敏响应,本文结果可用于研究新的离子探针进行特定离子的定性定量分析。

This paper chooses hydrothermal method to synthesize carbon dots(CDs)with high optical performance.The authors study the effects of the category and concentration of ions on the fluorescence signal of CDs,and analyze the features of the spectrogram.The result shows that fluorescent CDs can be synthesized by the reaction between citric acid and urea through hydrothermal method.It is also found that copper ions can quencher the fluorescence of CDs obviously.Meanwhile,the concentration of copper ions has a positive linear correlation with the fluorescence intensity of CDs.As the fluorescence signal of CDs has sensitive response to certain ions,the conclusion of this paper can be applied to explore new ion probe used in the analysis of certain ions.