Electrochemical sensor based on multiwalled carbon nanotube and gold nanoparticle modified electrode for the sensitive detection of bisphenol A
Electrochemical sensor based on multiwalled carbon nanotube and gold nanoparticle modified electrode for the sensitive detection of bisphenol A
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DOI：
10.1016/j.snb.2017.06.160
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发表时间：
2017-12-01
影响因子：
8.4
通讯作者：
Brett, Christopher M. A.
中科院分区：
文献类型：
--
作者：
Ben Messaoud, Najib;Ghica, Mariana Emilia;Brett, Christopher M. A.
研制了一种新型的双酚A电化学传感器，该传感器由多壁碳纳米管(MWCNT)和金纳米颗粒(AuNP)复合修饰的玻碳电极组成。用差示脉冲伏安法和电化学阻抗对其进行了表征。测试了不同MWCNT负载量和不同沉积AuNP层数的修饰电极结构，以及pH值对修饰电极结构的影响。在最佳实验条件下，该传感器对双酚A的线性响应范围为0.01~0.7微米，检测下限为4 nm，是目前检测下限最低的传感器之一。检测了传感器的重复性、重复性和稳定性，并优于文献报道的使用类似结构的双酚A传感器。对微摩尔浓度的阻抗传感器的前景也进行了评估。最后，证明了该修饰电极对常见干扰物的选择性，并成功地将该修饰电极应用于水中双酚A的测定。(C)2017爱思唯尔B.V.保留所有权利。
A novel electrochemical sensor for bisphenol A comprising a multiwalled carbon nanotube (MWCNT) and gold nanoparticle (AuNP) composite modified glassy carbon electrode has been developed. Differential pulse voltammetric and electrochemical impedance characterisation were carried out. Modified electrode architectures with different MWCNT loadings and different numbers of deposited AuNP layers were tested, as well as the influence of pH. Under the best experimental conditions, the sensor exhibited a linear response to BPA from 0.01 mu M to 0.7 mu M, with a limit of detection of 4 nM, one of the lowest achieved up until now. The reproducibility, repeatability and stability of the sensor were examined and are superior to those reported in the literature using similar architectures for BPA sensors. Perspectives for an impedimetric sensor at micromolar concentrations were also assessed. Finally, the selectivity with respect to common interferents was demonstrated and practical application of the developed modified electrode for the determination of BPA in waters was successfully carried out. (C) 2017 Elsevier B.V. All rights reserved.