分析化学2024，Vol.52Issue(4)：541-549,9.DOI:10.19756/j.issn.0253-3820.241048
沸石咪唑酯骨架材料-8/多壁碳纳米管电化学传感器灵敏检测镉离子(Ⅱ)和铅离子(Ⅱ)
Electrochemical Sensor for Sensitive Detection of Cadmium(Ⅱ)and Lead(Ⅱ)Based on Zeolitic Imidazolate Framework-8/Multi-Walled Carbon Nanotubes
摘要
Abstract
A a novel composite ZIF-8/MWCNT was synthesized by combining zeolitic imidazolate framework-8(ZIF-8)with multi-walled carbon nanotubes(MWCNT).The composite was modified on glassy carbon electrode(GCE)to obtain ZIF-8/MWCNT/GCE,which was served as an effective electrochemical sensor for detection of Pb2+ and Cd2+.Benefiting from the high electrical conductivity of MWCNT and the synergistic effect between ZIF-8 and MWCNT,ZIF-8/MWCNT showed excellent electrocatalytic activity in individual and simultaneous detection of Cd2+ and Pb2+.Under the optimized conditions,the linear ranges were 0.03‒8.00 μmol/L and 0.03‒6.00 μmol/L with corresponding limits of detection(S/N=3)of 0.019 and 0.035 μmol/L for individual detection of Cd2+and Pb2+,respectively.Whereas for simultaneous detection of Cd2+and Pb2+in their mixture solutions,the linear ranges were 0.03‒5.00 μmol/L and 0.03‒5.00 μmol/L with corresponding limits of detection(S/N=3)of 0.022 and 0.048 μmol/L,respectively.In addition,the sensor exhibited good stability,reproducibility and anti-interference ability.Moreover,the sensor showed good feasibility and accuracy for determination of Cd2+ and Pb2+ in actual river water samples with spiking recoveries of 98.1%‒104.0%and 98.3%‒102.2%,respectively.关键词
沸石咪唑酯骨架材料-8/多壁碳纳米管/镉离子(Ⅱ)/铅离子(Ⅱ)/电化学传感器/水样Key words
Zeolitic imidazolate framework-8/Multi-walled carbon nanotubes/Cadmium(Ⅱ)/Lead(Ⅱ)/Electro-chemical sensor/Water samples引用本文复制引用
冯小庚,孙迪,孙婧祎,胡盈,方雯倩,熊英..沸石咪唑酯骨架材料-8/多壁碳纳米管电化学传感器灵敏检测镉离子(Ⅱ)和铅离子(Ⅱ)[J].分析化学,2024,52(4):541-549,9.基金项目
国家自然科学基金项目(No.22305108)、辽宁省自然科学基金项目(No.2022-BS-116)和辽宁大学研究生优质课程建设与教学模式综合改革研究项目(No.YJG202302065)资助. Supported by the National Natural Science Foundation of China(No.22305108),the Natural Science Foundation of Liaoning Province,China(No.2022-BS-116),and the Project of Graduate Course Construction and Reform of Teaching Mode Research of Liaoning University(No.YJG202302065). （No.22305108）
