丽水学院学报2024，Vol.46Issue(2)：1-9,9.DOI:10.3969/j.issn.2095-3801.2024.02.001
荧光碳点的制备及其对微量Cr(Ⅵ)的检测
Preparation of Fluorescent Carbon Dots and Application for the Detection of Trace Cr(Ⅵ)
摘要
Abstract
This study focused on a kind of yellow fluorescent carbon dots(Y-CDs)prepared by chemical oxida-tion with acetaldehyde and sodium hydroxide as raw materials under normal temperature and pressure.Y-CDs were characterized by high-resolution transmission electron microscopy,infrared spectroscopy,X-ray photoelec-tron spectroscopy,ultraviolet spectroscopy and fluorescence spectroscopy.The results showed that the average particle size of the prepared Y-CDs was about 6 nm,the fluorescence quantum yield was 16.3%,the optimal ex-citation wavelength was 360 nm,and the maximum emission wavelength was 513 nm.It was found that Cr(Ⅵ)had a significant fluorescence quenching effect on Y-CDs,which was mainly caused by the inner filter effect and resonance energy transfer of fluorescence.Based on this mechanism,a method for the detection of trace Cr(Ⅵ)was established.When concentration of Cr(Ⅵ)was in the range of 0-240 mol/L,the fluorescence intensity of Y-CDs had a good linear relationship with Cr(Ⅵ)concentration(R2=0.990 3),and the detection limit(LOD)was 1.67 μmol/L.The method can be applied to the detection of trace Cr(Ⅵ),with the added standard recovery rate of 97.05%-104.0%(RSD≤4.38%,n=3).关键词
碳点/荧光光谱/离子检测/Cr(Ⅵ)/荧光猝灭Key words
carbon dots/fluorescence spectrum/ion detection/Cr(Ⅵ)/fluorescence quenching分类
通用工业技术引用本文复制引用
李鹏程,陈婧,董佳艺,陈语欣,季玉杰,俞若寒,王慕华,孙晓丽,翁倩云..荧光碳点的制备及其对微量Cr(Ⅵ)的检测[J].丽水学院学报,2024,46(2):1-9,9.基金项目
国家自然科学基金面上项目"亲水印迹-比率荧光耦合技术用于双酚类环境内分泌干扰物的可视化检测"(22076072) （22076072）
丽水学院实验室开放项目"荧光碳点的制备及其对氟喹诺酮的响应研究"(2023-25) （2023-25）
