| 翟慧云，黄 鑫，段鹏丽，刘 冷，王宇星，郭玉珍，杜意恩*.荧光碳点的制备及其对汞离子的选择性检测[J].海南师范大学学报自科版,2025,38(2):152-160 |
| 荧光碳点的制备及其对汞离子的选择性检测 |
| Preparation of Fluorescent Carbon Dots and Their Selective Detection of Mercury Ions |
| |
| DOI：10.12051/j.issn.1674-4942.2025.02.005 |
| 中文关键词: 荧光碳点 汞离子 聚乙烯亚胺 定量检测 |
| 英文关键词: fluorescent carbon dot mercury ion polyethyleneimine quantitative detection |
| 基金项目:山西省应用基础研究面上基金项目（201901D111303） |
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| 中文摘要: |
| 鉴于Hg²⁺对环境和人类健康的潜在威胁，开发一种高效、准确的Hg²⁺定量分析法显得
尤为重要。荧光检测法因其操作简便、成本低廉而备受青睐。因此，本研究致力探索一种低成本、
高灵敏度、良好选择性的荧光碳点检测法。首先利用缩水甘油对聚乙烯亚胺（HPEI）进行改性，然
后以柠檬酸和改性聚乙烯亚胺（mPEI）作为核心前驱物，通过优化反应条件，采用一步水热法成功
合成了改性聚乙烯亚胺修饰的荧光碳点（mPEI-CDs），荧光量子产率高达25.6%。实验结果显示，
mPEI-CDs的荧光猝灭效率（F0-F）/F0与Hg²⁺浓度成正相关，且在1 ~ 100 μmol/L浓度范围内呈现出良
好的线性关系，回归方程为y = 0.319 35 lgC + 1.941 34，相关系数R2
= 0.996，检出限为0.47 μmol/L。
这些荧光碳点不仅荧光性能优异，而且在Hg²⁺的检测中表现出较好的选择性和较高的灵敏度，将其
应用于海河水中Hg²⁺的检测，即便海河水中存在多种离子，如Na+
、K+
、Ca2+
、Cl-
、CO3
2-
等，仍可实现对
Hg2+
的高选择性和高灵敏度检测。这一发现为基于荧光碳点（mPEI-CDs）的荧光传感法在Hg²⁺定
量分析中的应用奠定坚实基础，同时丰富了Hg²⁺定量分析的技术手段，为环境监测、水质安全保障
以及人类健康风险评估提供了有力支持。 |
| 英文摘要: |
| In view of the potential threat of Hg2+
to the environment and human health, it is particularly important to develop
an efficient and accurate Hg2+
quantitative analysis method. Fluorescence detection method is popular because of its simple
operation and low cost. Therefore, this study aims to explore a low-cost, high sensitivity and good selectivity fluorescent car⁃
bon dot detection method. Firstly, polyethylenimine (HPEI) was modified by glycidyl, then the modified polyethylenimine
modified fluorescent carbon dots (mPEI-CDs) were successfully synthesized by one-step hydrothermal method with citric
acid and modified polyethylenimine (mPEI) as the core precursors. The fluorescence quantum yield was as high as 25.6 %.
The experimental results showed that the fluorescence quenching efficiency (F0-F)/F0 of mPEI-CDs was positively correlat⁃
ed with the concentration of Hg2+
with a good linear relationship in the range of 1 ~ 100 μmol/L. The regression equation
was y = 0.319 35 lgC + 1.941 34, the correlation coefficient R2
= 0.996, and the detection limit was 0.47 μmol/L. These fluorescent carbon dots not only have excellent fluorescence performance, but also show good selectivity and high sensitivity
in the detection of Hg2+
. When they were applied to the detection of Hg2+
in Haihe River , even if there were many ions in
the Haihe River, such as Na+
, K+
, Ca2+
, Cl-
, CO3
2-
, etc., high selectivity and high sensitivity detection of Hg2+ can still be
achieved. This discovery lays a solid foundation for the application of fluorescence sensing method based on fluorescent carbon
dots (mPEI-CDs) in the quantitative analysis of Hg2+
and enriches the technical means of quantitative analysis of Hg2+ and pro⁃
vides strong support for environmental monitoring, water quality security and human health risk assessment. |
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