首页|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)

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)

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
将沸石咪唑酯骨架材料-8(ZIF-8)与多壁碳纳米管(MWCNT)结合,制备得到ZIF-8/MWCNT复合材料,并基于此构建了一种可用于Cd2+和Pb2+同时测定的电化学传感器.MWCNT的引入增强了复合材料的导电性;同时,ZIF-8与MWCNT之间的协同作用使ZIF-8/MWCNT复合材料表现出优异的电催化活性,将ZIF-8/MWCNT复合材料修饰玻碳电极(GCE),能够实现Cd2+和Pb2+的分别和同时检测.在最优实验条件下,基于ZIF-8/MWCNT/GCE的电化学传感器对Cd2+和Pb2+分别检测的线性范围分别为0.03～8.00 μmol/L和0.03～6.00 μmol/L,检出限分别为0.019和0.035 μmol/L(S/N=3);对Cd2+和Pb2+同时检测的线性范围分别为0.03～5.00 μmol/L和0.03～5.00 μmol/L,检出限分别为0.022和0.048 μmol/L(S/N=3).此传感器具有良好的选择性、重现性和稳定性,将其用于实际河水样品中Cd2+和Pb2+的测定,加标回收率分别为98.1%～104.0%和98.3%～102.2%,表明此传感器适用于实际水样中Cd2+和Pb2+的分析检测.
Electrochemical Sensor for Sensitive Detection of Cadmium(Ⅱ)and Lead(Ⅱ)Based on Zeolitic Imidazolate Framework-8/Multi-Walled Carbon Nanotubes
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.

Zeolitic imidazolate framework-8Multi-walled carbon nanotubesCadmium(Ⅱ)Lead(Ⅱ)Electro-chemical sensorWater samples

冯小庚、孙迪、孙婧祎、胡盈、方雯倩、熊英

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辽宁大学化学院,沈阳 110036

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

国家自然科学基金辽宁省自然科学基金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

223051082022-BS-116YJG202302065

2024

10.19756/j.issn.0253-3820.241048

分析化学
中国化学会 中国科学院长春应用化学研究所

分析化学

CSTPCD北大核心
影响因子：1.423
ISSN：0253-3820
年,卷(期)：2024.52(4)
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