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首页> 外文期刊>Electroanalysis >Individual and Simultaneous Voltammetric Determination of Cd(II), Cu(II) and Pb(II) Applying Amino Functionalized Fe3O4@Carbon Microspheres Modified Electrode
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Individual and Simultaneous Voltammetric Determination of Cd(II), Cu(II) and Pb(II) Applying Amino Functionalized Fe3O4@Carbon Microspheres Modified Electrode

机译：施用氨基官能化Fe3O4修饰电极的单独和同时伏安法测定CD（II），Cu（II），Cu（II）和Pb（II）

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摘要

Amino-functionalized Fe3O4@carbon microspheres (NH2-Fe3O4@C) were prepared and the electrochemical sensor was constructed using NH2-Fe3O4@C modified glassy carbon electrodes (GCE) to determine toxic heavy metals in aqueous solution. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the structure and phase of NH2-Fe3O4@C. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results indicate that NH2-Fe3O4@C modified GCE possesses large active area and excellent electron transfer. Under optimized electrochemical condition, Cd(II), Pb(II) and Cu(II) were determined using NH2-Fe3O4@C modified GCE. The electrode through amino functionalization exhibits higher sensitivity and lower detection limit toward Cd(II) and Cu(II) due to the acid-base pairing interaction between the electron-rich -NH2 ligand and the electron-deficient heavy metal ions. Compared with other similar results reported in the literature, the NH2-Fe3O4@C modified electrode exhibits wider linear response range while with comparable lower detection limit. It also exhibits excellent stability, reproducibility and anti-interference ability.
机译：制备氨基官能化Fe3O4 @碳微球（NH2-FE3O4 @ C），使用NH2-FE3O4 @ C改性玻璃碳电极（GCE）构建电化学传感器，以确定水溶液中有毒重金属。扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）用于表征NH2-FE3O4 @ C的结构和相。循环伏安法（CV）和电化学阻抗光谱（EIS）结果表明，NH2-FE3O4 @ C改进的GCE具有大的有源区和优异的电子转移。在优化的电化学条件下，使用NH2-FE3O4 @ C改性GCE测定CD（II），Pb（II）和Cu（II）。由于电子富含电子-NH2配体和电子缺陷的重金属离子之间的酸碱配对相互作用，通过氨基官能化的电极表现出更高的敏感性和较低的敏感性和较低的检测限，并且CD（II）和Cu（II）。与文献中报告的其他类似结果相比，NH2-FE3O4 @ C修饰电极在具有相当的较低检测极限的同时表现出更宽的线性响应范围。它还表现出出色的稳定性，再现性和抗干扰能力。

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