An Ion Imprinted Polymers Grafted Paper-based Fluorescent Sensor Based on Quantum Dots for Detection of Cu2+ Ions
An Ion Imprinted Polymers Grafted Paper-based Fluorescent Sensor Based on Quantum Dots for Detection of Cu2+ Ions
复制标题
基于量子点的离子印迹聚合物接枝纸基荧光传感器用于检测 Cu2 离子
DOI：
10.1016/s1872-2040(15)60867-2
复制
发表时间：
2015-10-01
影响因子：
1.2
通讯作者：
Chen Ling-Xin
中科院分区：
文献类型：
--
作者：
Wang Xin-Ran;Li Bo-Wei;Chen Ling-Xin
基于微流控纸基分析装置，构建了一种新型的高选择性荧光传感器，用于水样中Cu 2+的测定。使用HCl溶液活化玻璃纤维纸并在CdTe量子点（QD）溶液中孵育以获得荧光基底。以3-氨丙基三乙氧基硅烷（APTES）为功能单体，正硅酸乙酯（TEOS）为交联剂，室温下在纸载玻璃纤维表面制备了铜离子印迹聚合物（Cu-IIP）。该荧光传感器主要依靠CdTe量子点与Cu 2+之间的电子跃迁实现对Cu 2+的特异性识别，并成功应用于水样中Cu 2+的测定。方法的线性范围为0.032-3.2 mg L-1，检出限为0.012 mg L-1。对海水和湖水中4个浓度水平的Cu ~（2+）进行了回收率测定，回收率在99.9%~ 122.5%之间。通过与电感耦合等离子体质谱（ICP-MS）分析结果的比较，表明量子点@Cu-IIP在Cu 2+的快速检测中具有良好的性能和应用前景。
A novel highly selective fluorescent sensor was fabricated based on the microfluidic paper-based analytical device for the determination of Cu2+ in aqueous samples. The glass fiber paper was activated using HCl solution and incubated in CdTe quantum dots (QDs) solution to obtain a fluorescent substrate. The Cu2+ imprinted polymers (Cu-IIP) was synthesized using 3-aminopropyl triethoxysilane (APTES) as functional monomer and TEOS as cross-linker on the surface of the glass fiber in paper at room temperature. This fluorescent sensor was successfully applied to determine the amount of Cu2+ in aqueous samples that mainly depended on the electron transition between the CdTe quantum dots and the Cu2+ for specific recognition Cu2+. A good linearity was presented in the range of 0.032-3.2 mg L-1, and the limit of detection was achieved at 0.012 mg L-1. Satisfactory recoveries ranging from 99.9% to 122.5% were attained for spiked seawater and lake water samples with four concentration levels of Cu2+. The paper@QDs@Cu-IIP showed a good performance and significant application perspectives for rapid detection of Cu2+ by comparing with the results of inductively coupled plasma-mass spectrometry (ICP-MS).