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| 黄色荧光碳点的可控制备及其对Hg2+的高灵敏检测研究 |
| Controllable synthesis of yellow fluorescent carbon dots and their application for highly sensitive detection of Hg2+ |
| 投稿时间：2025-03-05 |
| DOI：10.3969/j.issn.1005-5630.202503050042 |
| 中文关键词: 荧光碳点 溶剂热法 离子检测 荧光猝灭 |
| 英文关键词:fluorescent carbon dots solvothermal method ion detection fluorescence quenching |
| 基金项目:国家重点研发计划(2022YFF0607704)；上海市教育委员会教学研究室横向合作项目(H-2020-302-121) |
| 作者 | 单位 | E-mail | | 丁淑惠 | 上海理工大学 光电信息与计算机工程学院,上海 200093 | | | 韩朝霞 | 上海理工大学 光电信息与计算机工程学院,上海 200093
上海理工大学 光学仪器与系统教育部工程研究中心,上海 200093
上海理工大学 上海市现代光学系统重点实验室,上海 200093 | zxhan@usst.edu.cn | | 经玉静 | 上海理工大学 光电信息与计算机工程学院,上海 200093 | | | 杨策 | 上海理工大学 光电信息与计算机工程学院,上海 200093 | | | 张大伟 | 上海理工大学 光电信息与计算机工程学院,上海 200093
上海理工大学 光学仪器与系统教育部工程研究中心,上海 200093
上海理工大学 上海市现代光学系统重点实验室,上海 200093 | | | 洪瑞金 | 上海理工大学 光电信息与计算机工程学院,上海 200093
上海理工大学 光学仪器与系统教育部工程研究中心,上海 200093
上海理工大学 上海市现代光学系统重点实验室,上海 200093 | | | 陶春先 | 上海理工大学 光电信息与计算机工程学院,上海 200093
上海理工大学 光学仪器与系统教育部工程研究中心,上海 200093
上海理工大学 上海市现代光学系统重点实验室,上海 200093 | | | 禹德朝 | 上海理工大学 光电信息与计算机工程学院,上海 200093
上海理工大学 光学仪器与系统教育部工程研究中心,上海 200093
上海理工大学 上海市现代光学系统重点实验室,上海 200093 | |
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| 中文摘要: |
| 作为一种新型的碳基纳米材料，荧光碳点凭借优异的光学性能、低毒性、易溶于水及表面易功能化等特点，在环境监测领域展现出广阔的应用前景。以邻苯二胺和乙二胺四乙酸为前驱体，通过溶剂热法成功制备了黄色荧光碳点（Y-CDs）。表征结果表明，所制备Y-CDs的平均粒径约为1.9 nm，且具有优异的光稳定性与水分散性，最佳激发波长为428 nm，最佳发射波长为549 nm，量子产率为11.29 %。所制备的Y-CDs具有石墨化晶格结构，且表面富含氨基、羟基等活性官能团。将制备的Y-CDs应用于金属离子检测，实验结果表明，所制备Y-CDs对Hg2+具有高选择性和高灵敏度，其检测范围为0 ～ 60 μmol/L，检出限低至0.133 μmol/L，显著优于多数已报道的碳基荧光探针。本研究基于Hg2+与Y-CDs间的动态猝灭效应和电子转移机制，构建了一种高灵敏度Hg2+荧光探针，在环境监测与食品安全领域展现出潜在应用价值。 |
| 英文摘要: |
| Fluorescent carbon dots, as a new type of carbon-based nanomaterial, have demonstrated broad application prospects in the field of environmental monitoring due to their excellent optical properties, low toxicity, good water solubility, and ease of surface functionalization. In this study, yellow fluorescent carbon dots (Y-CDs) were successfully synthesized via a solvothermal method using o–phenylenediamine and ethylenediaminetetraacetic acid as precursors. The characterization results showed that the average particle size of the synthesized Y-CDs was about 1.9 nm, and they had excellent photostability and water dispersibility. The optimal excitation wavelength was 428 nm. The optimal emission wavelength was 549 nm. The quantum yield was 11.29%. The synthesized Y-CDs possessed a graphitized lattice structure and were rich in active functional groups such as amino and hydroxyl groups on the surface. The synthesized Y-CDs were applied to metal ion detection. The experimental results showed that the Y-CDs exhibit exceptional selectivity and sensitivity toward Hg2+, the detection range was 0–60 μmol/L, and the lowest detection limit was 0.133 μmol/L, which were significantly better than those of most reported carbon-based fluorescent probes. The highly sensitive fluorescent probe for Hg2+ detection is developed based on the dynamic quenching effect and electron transfer mechanism between Hg2+ and Y-CDs, which has potential application value in the fields of environmental monitoring and food safety. |
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