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首页> 外文期刊>Analytical methods >Eco-friendly synthesis of cuprizone-functionalized luminescent carbon dots and application as a sensor for the determination of copper(II) in wastewater
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Eco-friendly synthesis of cuprizone-functionalized luminescent carbon dots and application as a sensor for the determination of copper(II) in wastewater

机译：铜酮官能化的发光碳点的环保合成及其作为测定废水中铜（II）的传感器的应用

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摘要

A novel and eco-friendly procedure for synthesizing fluorescent carbon dots (CDs) functionalized with cuprizone and their application for the selective determination of Cu2+ are presented in this work. Water-soluble and fluorescent CDs were synthesized by a simple, low cost and green approach using sugarcane juice as a renewable natural source for the production of CDs. For the characterization of the CDs, UV-vis absorption spectroscopy, fluorescence spectroscopy, the dynamic light scattering technique, Fourier transform infrared spectroscopy, and transmission electron microscopy were used. The synthesized CDs have been functionalized with cuprizone (CPZ) in a simple, fast and single-step procedure. The functionalization eliminated all interference of the other studied metals and the CDs/CPZ was applied to the selective determination of Cu2+ in water. Under optimum conditions, a good linear relationship between the fluorescence intensity function and the concentration of Cu2+ in the range from 5.12 μM to 100 μmol L?1 with a detection limit (S/N = 3) of 0.76 μmol L?1 was obtained. Finally, this article proposes for the first time a factorial design to optimize the parameters for CD synthesis indicating that the luminescence intensity is a function of temperature and not of the heating time in the hydrothermal process.
机译：在这项工作中，提出了一种新颖且环保的方法，该方法可合成用铜酮功能化的荧光碳点（CD）及其在选择性测定Cu2 +中的应用。水溶性和荧光CD通过简单，低成本和绿色方法合成，使用甘蔗汁作为CD的可再生天然来源。为了表征CD，使用了紫外可见吸收光谱，荧光光谱，动态光散射技术，傅立叶变换红外光谱和透射电子显微镜。合成的CD已通过cuprizone（CPZ）以简单，快速且一步一步的方法进行了功能化。官能化消除了其他研究金属的所有干扰，CD / CPZ用于选择性测定水中的Cu2 +。在最佳条件下，荧光强度函数与Cu2 +浓度在5.12μM至100μmolL？1范围内具有良好的线性关系，检测极限（S / N = 3）为0.76μmolL？1。最后，本文首次提出了析因设计，以优化CD合成的参数，表明发光强度是温度的函数，而不是水热过程中加热时间的函数。

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