| 基于柠檬酸盐修饰CdS量子点的高灵敏Ag~+传感器 |
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| 引用本文： | 董玉明,王光丽,李在均. 基于柠檬酸盐修饰CdS量子点的高灵敏Ag~+传感器[J]. 无机化学学报, 2010, 26(11): 1981-1986 |
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| 作者姓名： | 董玉明 王光丽 李在均 |
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| 作者单位： | 江南大学化学与材料工程学院,无锡,214122 |
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| 基金项目： | 国家自然科学基金，南京大学生命分析化学教育部重点实验室开放研究基金 |
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| 摘 要： | 以柠檬酸三钠作为表面修饰剂,利用简单的方法合成了水溶性柠檬酸三钠修饰的CdS量子点(Cit-CdS)。研究了反应前驱体中nCd/nS比、反应溶液pH值、反应温度等条件对产物的荧光性质的影响。在巯基乙酸存在下,Ag+能大大增强量子点的荧光。基于此,构建了基于Cit-CdS的高灵敏Ag+传感器。传感器在Ag+浓度为5.0×10-9~2.0×10-6mol·L-1内对银离子线性响应良好,检测限为1.0×10-9mol·L-1。其它常见金属离子对Ag+的测定并无明显干扰。
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| 关 键 词： | 柠檬酸三钠； CdS量子点； Ag+传感器 |
Highly Sensitive Ag+ Sensor Based on Citrate Capped CdS Quantum Dots |
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| DONG Yu-Ming,WANG Guang-Li and LI Zai-Jun. Highly Sensitive Ag+ Sensor Based on Citrate Capped CdS Quantum Dots[J]. Chinese Journal of Inorganic Chemistry, 2010, 26(11): 1981-1986 |
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| Authors: | DONG Yu-Ming WANG Guang-Li LI Zai-Jun |
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| Affiliation: | School of Chemistry and Chemical Engineering, Jiangnan University, Wuxi, Jiangsu 214122,School of Chemistry and Chemical Engineering, Jiangnan University, Wuxi, Jiangsu 214122 and School of Chemistry and Chemical Engineering, Jiangnan University, Wuxi, Jiangsu 214122 |
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| Abstract: | Water-soluble citrate sodium capped CdS quantum dots (Cit-CdS) were prepared using a simple method. The effects of synthetic conditions such as the molar ratio of Cd/S, pH value of reaction solution, reaction temperature were investigated on the photoluminescence properties of CdS. In the presence of thioglycolic acid, the photoluminescence intensity of CdS was greatly enhanced by Ag+. Based on this phenomenon, a highly sensitive Ag+ sensor was developed. The sensor showed a linear response to Ag+ in the concentration ranging from 5.0×10-9 mol·L-1 to 2.0×10-6 mol·L-1, with a detection limit of 1.0×10-9 mol·L-1. |
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| Keywords: | citrate sodium CdS quantum dots Ag+ sensor |
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