材料科学
检出限
氯化物
电化学
纳米颗粒
电解质
电化学气体传感器
支撑电解质
选择性
涂层
核化学
无机化学
电极
化学工程
纳米技术
色谱法
催化作用
化学
有机化学
物理化学
冶金
工程类
作者
Qianyun Bin,Lishi Wang,Lishi Wang
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2020-01-07
卷期号:31 (12): 125601-125601
被引量:45
标识
DOI:10.1088/1361-6528/ab5cde
摘要
In this work, silver nanoparticles (Ag NPs) were decorated into the cavities of ZIF-8 to fabricate a novel Ag NPs/ZIF-8 modified glassy carbon electrode (GCE) for electrochemical sensing of chloride ion. Benefiting from the synergistic properties of ZIF-8 and Ag NPs, the Ag NPs/ZIF-8/GCE showed favorable performance towards chloride ion. For comparison, the electrochemical activity of Ag NPs wrapped by ZIF-8 (Ag NPs@ZIF-8) and Ag NPs coating on ZIF-8 (Ag NPs-on-ZIF-8) were also investigated and it was found that Ag NPs/ZIF-8 possessed the best performance. Some experimental parameters including pH of the supporting electrolyte and scan rate were also investigated. Under optimal conditions, the proposed sensor exhibited excellent stability, reproducibility and selectivity for the determination of chloride ion with a wide linear detection range from 5 to 4000 μmol dm-3 and a low detection limit of 0.61 μmol dm-3 (S/N = 3). The proposed sensor was successfully applied to the determination of chloride ion spiked in human serum. All these results indicated that the developed Ag NPs/ZIF-8/GCE sensor was superior.
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