青花椒碳点荧光探针的制备及其对Cu²⁺的检测

Preparation of Fluorescent Carbon Dots from Zanthoxylum schinifolium Sieb. et Zucc. and Its Detection of Cu²⁺

摘要: 以青花椒为原料制备了荧光碳量子点(CDs)，在荧光激发和发射波长分别为315 nm、425 nm处，荧光碳量子点可以用于样品中Cu²⁺的分析检测，在pH = 7，温度25℃条件下，随着lg [Cu²⁺]的增加，CDs的荧光强度呈下降趋势，其线性回归方程为ΔF = 121.41 lgc + 205.10，线性范围为0.1 mmol/L~500 mmol/L，相关系数r = 0.9971。将此方法用于样品中Cu²⁺含量的测定，回收率为99%~101%。

Abstract: Fluorescent carbon dots (CDs) were prepared from Zanthoxylum schinifolium Sieb. et Zucc. Under the excitation and emission wavelengths of 315 nm and 425 nm respectively, the CDs can be used for the analysis and detection of Cu²⁺ in samples. At pH 7 and 25˚C, the increase in lg [Cu²⁺] is directly proportional to the increase in the fluorescence intensity of CDs. The linear regression equation is ΔF = 121.41 lgc + 205.10, with a linear range of 0.1 mmol/L to 500 mmol/L and a correlation coefficient r = 0.9971. This method was applied to the determination of Cu²⁺ content in samples, with a recovery rate of 99% to 101%.