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| 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 Selective Detection of Mercury Ions |
| 投稿时间：2024-09-06 修订日期：2024-10-23 |
| DOI： |
| 中文关键词: 荧光碳点 汞离子 聚乙烯亚胺 |
| 英文关键词: fluorescent carbon dots mercury ions polyethyleneimine |
| 基金项目:2019年度山西省应用基础研究面上基金（201901D111303） |
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| 中文摘要: |
| 汞（Hg）是一种极为有害的污染物，食用鱼类是其进入人体的主要途径，对中枢神经系统、肾脏和肝脏产生显著负面影响。因此，对环境中汞离子（Hg2+）的定量分析显得尤为重要。本研究采用一步水热法合成荧光量子产率为25.6 % 的改性聚乙烯亚胺修饰的荧光碳点（mPEI-CDs），该荧光碳点成功应用于水样中Hg2+的高选择性和高灵敏度定量测定。mPEI-CDs的荧光猝灭效率（F0-F）/F0与Hg2+浓度成正比，在1-100 μM浓度范围内呈现良好的线性关系，并成功应用于海河水中Hg2+的检测。 |
| 英文摘要: |
| Mercury (Hg) is a highly hazardous pollutant, and consuming fish is a primary means of human exposure to it. The accumulation of this substance has significant negative effects on the central nervous system, kidneys, and liver, making quantitative analysis of Hg2+ in the environment crucial. A one-step hydrothermal method was used to synthesize mPEI-CDs with a fluorescence quantum yield of 25.6%. These carbon dots were used for the quantitative determination of Hg2+ in water samples with high selectivity and sensitivity. The fluorescence quenching efficiency (F0-F)/F0 of mPEI-CDs is directly proportional to the concentration of Hg2+, exhibiting a favorable linear relationship within the concentration range of 1-100 μM. Subsequently, it was effectively applied to the measurement of Hg2+ in Haihe River water. |
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