基于CdTe量子点-电纺纳米纤维组装体可视化、便携检测铜离子  

CdTe Quantum Dots-Electrospun Nanofibers Assembly for Visual and Portable Detection of Cu^2+

作　　者：李夏楚秦 杨通 王健[2] 黄承志[1,2] LI Xia-Chu-Qin;YANG Tong;WANG Jian;HUANG Cheng-Zhi(Key Laboratory of Luminescence Analysis and Molecular Sensing,Ministry of Education,College of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China;Key Laboratory of Luminescent and Real-Time Analytical System,Chongqing Science and Technology Bureau,College of Pharmaceutical Sciences,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学化学化工学院,发光分析与分子传感教育部重点实验室,重庆400715 [2]西南大学药学院,发光与实时分析系统重庆市重点实验室,重庆400715

出　　处：《分析化学》2021年第2期207-215,共9页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21535006)资助。

摘　　要：采用静电纺丝技术制备得到抗湿性能良好的电纺纳米纤维,进一步与CdTe量子点(CdTe QDs)静电结合得到组装体。扫描电镜、透射电镜和共聚焦荧光显微成像表征结果表明,在pH 7.2、静电组装时间90 min的条件下,CdTe QDs均匀地组装在电纺纳米纤维表面,在365 nm紫外灯照射下,CdTe QDs-电纺纳米纤维组装体呈现红色荧光,而Cu 2+能显著地猝灭CdTe QDs-电纺纳米纤维组装体的荧光,其猝灭程度与Cu 2+浓度在0.08~800μmol/L范围内呈现良好的线性关系,检出限为11.1 nmol/L。本方法简单、便携、选择性好,并成功应用于环境水样中Cu 2+的可视化及便携检测。Electrospun nanofibers(NFs)with good moisture-resistance were prepared by electrospinning technology,and further assembled with CdTe quantum dots(CdTe QDs).The results of scanning electron microscopy,transmission electron microscopy and confocal fluorescence microscopy showed that the CdTe QDs with strong fluorescence were uniformly assembled on the electrospun NFs after the electrostatic adsorption for 90 min at pH 7.2.Under 365 nm excitation,the CdTe QDs-electrospun NFs assembly presented red fluorescence,which could be significantly quenched by copper ion(Cu 2+),and the fluorescence quenching degree of CdTe QDs electrospun NFs assembly showed a good linear relationship with concentration of Cu 2+in the concentration range of 0.08-800μmol/L,and the detection limit was 11.1 nmol/L(S/N=3).This method had advantages of simplicity and high selectivity,and was successfully applied to the visualization and portable detection of copper ions in environmental water samples.

关 键 词：电纺纳米纤维 CDTE量子点 铜离子 可视化 便携 

分 类 号：O657.3[理学—分析化学] TQ340.64[理学—化学] X832[化学工程—化纤工业]