Electrochemical Sensor for Sensitive Detection of Cadmium(Ⅱ)and Lead(Ⅱ)Based on Zeolitic Imidazolate Framework-8/Multi-Walled Carbon Nanotubes
10.19756/j.issn.0253-3820.241048
- VernacularTitle: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)
- Author:
Xiao-Geng FENG
1
;
Di SUN
;
Jing-Yi SUN
;
Ying HU
;
Wen-Qian FANG
;
Ying XIONG
Author Information
1. 辽宁大学化学院,沈阳 110036
- Keywords:
Zeolitic imidazolate framework-8;
Multi-walled carbon nanotubes;
Cadmium(Ⅱ);
Lead(Ⅱ);
Electro-chemical sensor;
Water samples
- From:
Chinese Journal of Analytical Chemistry
2024;52(4):541-549
- CountryChina
- Language:Chinese
-
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.
