| 基于柠檬酸盐修饰CdS量子点的高灵敏Ag+传感器 |
| Highly Sensitive Ag+ Sensor Based on Citrate Capped CdS Quantum Dots |
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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5.0×10-9~2.0×10-6 mol·L-1内对银离子线性响应良好，检测限为1.0×10-9 mol·L-1。其它常见金属离子对Ag+的测定并无明显干扰。 |
| 关键词: 柠檬酸三钠 CdS量子点 Ag+传感器 |
| 基金项目: |
| 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. |
| Keywords: citrate sodium CdS quantum dots Ag+ sensor |
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| 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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