Eu@UiO-66-(COOH)_(2)荧光体系的构建和重金属离子检测的应用  

Construction of Eu@UiO-66-(COOH)_(2) Photoluminescent System and Application in The Detection of Heavy Metal Ions

作　　者：高源 李猛[2] 于睿 周子涵 高禹 蒋荣立[1] 张吉雄[3] GAO Yuan;LI Meng;YU Rui;ZHOU Zi-han;GAO Yu;JIANG Rong-li;ZHANG Ji-xiong(School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《稀土》2024年第4期80-88,共9页Chinese Rare Earths

基　　金：江苏省“双创博士”项目2020(31045)。

摘　　要：铜是生命体的必需营养素,也是典型的重金属污染物,因此对生命体和水体中的铜进行高灵敏度和高选择性的检测对于生态环境、食品安全和人类健康具有重要意义。镧系金属有机框架(Ln-MOFs)在结构与发光方面的优异性能,可以实现对镧系离子(Ln^(3+))荧光强度变化定性/定量的特异性探测,但是Ln^(3+)的高配位数、结构不易控制、水稳定性差等缺点限制了Ln-MOFs在水溶液检测中的实际应用。本文通过后合成修饰的方法,得到了一种镧系离子掺杂的Eu@UiO-66-(COOH)_(2),该Ln-MOF材料具有良好的稳定性和荧光性能,能够对水溶液中的Cu^(2+)进行探测,响应时间30 s,检测限低至0.63μmol/L,在干扰阳离子共存的复杂条件下仍然呈现出高灵敏度的荧光检测性能。该研究为今后Ln-MOFs荧光传感材料的设计与环境相关领域应用提供了重要参考。Copper is an essential nutrient for life and a typical heavy metal pollutant.Therefore,the detection of copper in life and water with high sensitivity and selectivity is of great significance for ecological environment,food safety,and human health.The excellent properties of lanthanide metal-organic frameworks(Ln-MOFs)can realize qualitative or quantitative specific detection functions based on changes in lanthanide ion(Ln^(3+))photoluminescent intensities.However,the disadvantages of Ln^(3+),such as its high coordination number,uncontrollable structure,and poor water stability,limit the practical applications of Ln-MOFs in aqueous solutions.In this paper,a lanthanide ion-doped Eu@UiO-66-(COOH)_(2) material was obtained by a post-synthesis modification method.This Ln-MOF material has high stability and photoluminescent properties and can be used for detecting Cu^(2+)in aqueous solutions.Under the complex conditions that interfere with the coexistence of cations,the photoluminescent detection performance is still highly sensitive with response time of 30 s and detection limit as low as 0.63μmol/L.This study provides an important reference for the future design and application of Ln-MOFs sensing materials in related fields in the future.

关 键 词：镧系金属有机框架 荧光传感 重金属检测 干扰离子 检测限 

分 类 号：O616[理学—无机化学]