| 基于氮掺杂碳量子点的制备及其对Hg2+的响应 |
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| 引用本文： | 孙雪花,张锦婷,赵李艳,崔华莉,魏悦悦,刘丽丽.基于氮掺杂碳量子点的制备及其对Hg2+的响应[J].环境化学,2021(1):321-326. |
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| 作者姓名： | 孙雪花 张锦婷 赵李艳 崔华莉 魏悦悦 刘丽丽 |
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| 作者单位： | 陕西省化学反应工程重点实验室 |
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| 基金项目： | 陕西省科技厅自然科学基金(2020JM-551);陕西省教育厅重点科学研究项目(20JS156);2019年国家大学生创新训练项目(201910719032)资助。 |
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| 摘 要： | 以乙二胺和抗坏血酸为原料,通过一步水热法制备了水溶性的氮掺杂碳量子点(N-CQDs).研究了N-CQDs的形貌特征、光学性能和应用分析.表征结果说明,N-CQDs形态为均匀分散的球形,有明显的晶格条纹,抗光漂白性能良好,表面富有含氧官能团,具有良好的水溶性.此外发现N-CQDs还具有优良的荧光性能和荧光稳定性,量子产率可以高达12.29%.分析得出,Hg2+对N-CQDs在1.0—120μmol·L-1范围内有一定的猝灭效应,可作为Hg2+的荧光探针,检出限达230 nmol·L-1.
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| 关 键 词： | 氮掺杂碳量子点 水热法 荧光探针 Hg2+ |
Preparation of nitrogen-doped carbon quantum dots and its response to Hg2+ |
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| SUN Xuehua,ZHANG Jinting,ZHAO Liyan,CUI Huali,WEI Yueyue,LIU Lili.Preparation of nitrogen-doped carbon quantum dots and its response to Hg2+[J].Environmental Chemistry,2021(1):321-326. |
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| Authors: | SUN Xuehua ZHANG Jinting ZHAO Liyan CUI Huali WEI Yueyue LIU Lili |
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| Institution: | (Key Lab of Chemical Reaction Engineering of Shaanxi Province,College of Chemistry and Chemical Engineering,Yan’an University,Yan’an,716000,China) |
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| Abstract: | Water soluble nitrogen doped carbon quantum dots(N-CQDs) were prepared by one-step hydrothermal method from ethylenediamine and ascorbic acid. The morphology, optical properties and application of N-CQDs are studied. The characterization results showed that N-CQDs were spherical in shape, with obvious lattice fringes, good in photobleaching resistance, rich in oxygen-containing functional groups and good in water solubility. In addition, it was found that N-CQDs had excellent fluorescence performance and fluorescence stability, and the quantum yield could be as high as 12.29%. The results showed that Hg2+ had certain quenching effect on N-CQDs, and it could be used as the fluorescent probe of Hg2+ in the range of 1.0—120 μmol·L-1, and the detection limit was up to 230 nmol·L-1. |
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| Keywords: | nitrogen doped carbon quantum dots(N-CQDs) hydrothermal method fluorescent probe Hg2+ |
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