稀土基金属有机框架材料的制备及其对Pb^(2+)的电化学检测  

Preparation of rare earth-based metal organic framework materials and their electrochemical detection of Pb^(2+)

作　　者：王莹[1] 初红涛[1] 张庆合[2] WANG Ying;CHU Hong-tao;ZHANG Qing-he(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China;Division of Chemical Metrology and Analytical Science,National Institute of Metrology,Beijing 100029,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [2]中国计量科学研究院化学计量与分析科学研究所,北京100029

出　　处：《化学研究与应用》2024年第6期1222-1229,共8页Chemical Research and Application

基　　金：黑龙江省省属高校基本科研业务费科研项目(135509304)资助。

摘　　要：室温下以硝酸钬为金属源,均苯三甲酸为有机配体,通过--步共混法制备出形貌均一的棒状稀土基金属有机框架材料(Ho-MOF),在玻碳电极基底上,采用两步滴涂法制备Ho-MOF-NIP复合修饰电极,成功构建了用于检测Pb^(2+)的电化学传感器(Ho-MOF-NIP/GCE)。采用差分脉冲阳极溶出伏安法(DPASV)研究了Pb^(2+)在该修饰电极上的电化学行为。实验结果表明:该电极对Pb2的检测灵敏度显著提升,在0.1~1 mmol.LI范围内,氧化峰电流值与Pb^(2+)的浓度呈现良好的线性关系,检测限为7 pumol.L'(S/N=3),该方法可用于水样中Pb^(2+)的快速检测。One-step blending of Ho(NO,);as a metal source and H,BTC as an organic ligand at room temperature resulted in the preparation of a homogeneous rod-shaped rare-earth-based metal-organic framework material(Ho-MOF).The Ho-MOF-NIP compos-ite modified electrode was prepared by a two-step drop-coating method on a glassy carbon electrode substrate,and then an electro-chemical sensor(Ho-MOF-NIP/GCE)was successfully constructed for the detection of Pb^(2+).The electrochemical behaviour of Pb^(2+)at this modified electrode was investigated by using differential pulsed anodic dissolution voltammetry(DPASV).The experimental results showed that the sensitivity of the electrode for the detection of Pb^(2+) was significantly improved,and the oxidation peak current value showed a good linear relationship with the concentration of Pb^(2+) in the range of 0.1~1 mmol·L^(-1).The detection limit was 7μmol·L^(-1)(S/N=3),which can be used for the rapid detection of Pb^(2+)in water samples.

关 键 词：稀土基金属有机框架 离子印迹技术 铅离子 差分脉冲阳极溶出伏安法 

分 类 号：O657.1[理学—分析化学]