| 表面富S2-的硫化镉量子点的合成及其在汞离子定量分析中的应用 |
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| 引用本文： | 陈述,范亚,龙云飞.表面富S2-的硫化镉量子点的合成及其在汞离子定量分析中的应用[J].湖南科技大学学报(自然科学版),2011,26(1). |
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| 作者姓名： | 陈述 范亚 龙云飞 |
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| 作者单位： | 湖南科技大学,化学化工学院,理论化学与分子模拟省部共建教育部重点实验室,湖南,湘潭,411201 |
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| 基金项目： | 湖南省自然科学基金资助项目(09JJ6021); 湖南省青年骨干教师培养资助项目; 湖南科技大学博士科研启动基金资助项目(E51084) |
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| 摘 要： | 在水溶液中采用柠檬酸三钠和六偏磷酸钠作为稳定剂,通过控制较低浓度的无机镉源溶液和硫源溶液缓慢接触反应,在冰水浴条件下一步成功合成了荧光稳定性好、表面富硫的水溶性CdS量子点.并利用Hg2+与CdS富硫表面的过量S2-的特异结合反应所引起的量子点的荧光淬灭效应,实现了对水溶液中痕量汞离子的选择性定量分析检测.考察了不同种类缓冲溶液、pH值条件、量子点浓度等因素对荧光淬灭程度的影响,在优化的最佳实验条件下,汞离子分析测定的线性范围为0.05～33μmol.L-1.
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| 关 键 词： | 表面富S2- 硫化镉量子点 荧光淬灭 汞离子 |
Studies on the synthesis of CdS quantum dots with s2- enriched surface and its application in quantitative analysis of Hg2+ |
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| CHEN Shu,FAN Ya,LONG Yun-fei.Studies on the synthesis of CdS quantum dots with s2- enriched surface and its application in quantitative analysis of Hg2+[J].Journal of Hunan University of Science & Technology(Natural Science Editon),2011,26(1). |
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| Authors: | CHEN Shu FAN Ya LONG Yun-fei |
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| Institution: | CHEN Shu,FAN Ya,LONG Yun-fei (Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education,School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China) |
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| Abstract: | The water-soluble CdS quantum dots with sulfur ion enriched surface and stable fluorescence was fabricated by one-step approach,in which the reaction rate was controlled by giving low concentration of inorganic cadmium and sulfur precursor and using both sodium hexametaphosphate and sodium citrate as stabilizing agents in an ice cold bath.It was found that excessive S2-at the surface of CdS can interact specifically with Hg2+,resulting in the quenching of fluorescence signals,which was applied in the select... |
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| Keywords: | S2-enriched surface CdS quantum dots fluorescence quenching mercury ion |
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