介孔材料
材料科学
电化学
电化学气体传感器
X射线光电子能谱
镉
检出限
校准曲线
分析化学(期刊)
砷
核化学
化学工程
化学
电极
环境化学
冶金
色谱法
生物化学
工程类
物理化学
催化作用
作者
Yelin Zhu,Shuxing Zhou,Jian Zhu,Ping Wang,Xinzhong Wang,Xiuxiu Jia,Thomas Wågberg,Guangzhi Hu
标识
DOI:10.1016/j.ecoenv.2022.113987
摘要
In this work, MIL-100(Fe)-decorated mesoporous carbon powders ([email protected](Fe)) were prepared by in situ growth of MIL-100(Fe) on the surface of ZIF-8 framework-based mesoporous carbons (MC). The hybrid material was characterized using SEM equipped with EDS mapping for morphology investigation, X-ray photoelectron spectroscopy for chemical valence analysis, and X-ray diffraction for crystal structure determination. The developed sensor separated from the traditional bismuth film decoration, and simultaneously, [email protected](Fe) was applied for the first time to electrochemically detect trace amounts of Pb(II) and Cd(II). The fabricated [email protected](Fe)-based electrochemical sensor showed excellent response to the target analytes at –0.55 and − 0.75 V for lead and cadmium ions, respectively. By adjusting some measurement parameters, that is, the loading concentration of [email protected](Fe), acidity of the HAc-NaAc buffer (ABS), deposition potential, and deposition time, the analytical performance of the proposed electrochemical sensor was examined by exploring the calibration curve, repeatability, reproducibility, stability, and anti-interference under optimized conditions. The response current of the proposed [email protected](Fe) electrochemical sensor showed a well-defined linear relationship in the concentration ranges of 2–250 and 2–270 μg·L−1 for Cd(II) and Pb(II), respectively. In addition, the detection limits of the sensor for Cd(II) and Pb(II) were 0.18 and 0.15 μg L−1, respectively, which are well below the World Health Organization (WHO) drinking water guideline value. The [email protected](Fe) can be potentially used as an electrochemical platform for monitoring heavy metals in surface water, with satisfactory results.
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