Hydrothermal synthesis of NiFe2O4 nanoparticles as an efficient electrocatalyst for the electrochemical detection of bisphenol A,New Journal of Chemistry

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Hydrothermal synthesis of NiFe2O4 nanoparticles as an efficient electrocatalyst for the electrochemical detection of bisphenol A
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-03-28 , DOI: 10.1039/d0nj00608d
Ganesh Kesavan _{1,

2,

3,

4,

5} , Nandini Nataraj _{1,

2,

3,

4,

5} , Shen-Ming Chen _{1,

2,

3,

4,

5} , Li-Heng Lin _{1,

2,

3,

4,

5}

Affiliation

In this study, the sensitive and selective detection of bisphenol A (BPA) was achieved using a screen-printed carbon electrode (NFO/SPCE) modified with hydrothermally synthesized NiFe₂O₄ nanoparticles. The crystalline structure, surface morphology and electrical conductivity of the nanoparticles were analyzed using X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The as-prepared NiFe₂O₄ (NFO) nanoparticles exhibited a cubic crystal structure with an average crystallite size of 16 nm, as calculated using the Scherrer equation. As determined by cyclic voltammetry (CV), NFO/SPCE exhibited excellent electrochemical oxidation towards the detection of BPA. Subsequently, differential pulse voltammetry (DPV) studies revealed a rapid and stable response to the consecutive addition of BPA in a linear range of 0.02–12.5 μM with a lower limit of detection (LOD) of 6 nM, which was superior to previously reported results. In addition, the proposed method showed good stability and excellent repeatability for the determination of BPA in real samples.

中文翻译：

水热法合成NiFe2O4纳米粒子作为电化学检测双酚A的有效电催化剂

在这项研究中，使用水热合成的NiFe ₂ O ₄纳米粒子修饰的丝网印刷碳电极（NFO / SPCE）实现了对双酚A（BPA）的灵敏和选择性检测。使用X射线粉末衍射（XRD），傅里叶变换红外光谱（FT-IR），扫描电子显微镜（SEM）和电化学阻抗谱（EIS）分析了纳米颗粒的晶体结构，表面形态和电导率。制备的NiFe ₂ O ₄（NFO）纳米颗粒表现出立方晶体结构，平均晶体尺寸为16 nm（使用Scherrer方程计算）。如通过循环伏安法（CV）所确定，NFO / SPCE对检测BPA表现出出色的电化学氧化作用。随后，差分脉冲伏安法（DPV）研究表明，在0.02–12.5μM的线性范围内连续添加BPA具有快速而稳定的响应，检测下限（LOD）为6 nM，优于先前报道的结果。此外，所提出的方法在测定实际样品中的双酚A方面显示出良好的稳定性和极好的可重复性。

更新日期：2020-03-28

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