Designing and fabrication of a novel gold nanocomposite structure: application in electrochemical sensing of bisphenol A
Designing and fabrication of a novel gold nanocomposite structure: application in electrochemical sensing of bisphenol A
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DOI：
10.1080/03067319.2018.1512595
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发表时间：
2018-01-01
影响因子：
2.6
通讯作者：
Veisi, Hojat
中科院分区：
文献类型：
--
作者：
Baghayeri, Mehdi;Ansari, Reza;Veisi, Hojat
介绍了一种用于双酚a （BPA）直接电氧化的高灵敏度电化学传感器。以多壁碳纳米管/硫醇功能化磁性纳米颗粒（Fe3O4-SH）作为固定平台，金纳米颗粒（AuNPs）作为放大电化学信号，制备了新型纳米复合材料。化学吸附的AuNPs在检测BPA方面表现出优异的电化学活性。傅里叶变换红外光谱、场发射扫描电镜、透射电镜和能量色散x射线衍射等分析技术揭示了纳米复合材料的形成过程。在最佳条件下（pH 9），传感器的线性范围为0.002-240M，具有高灵敏度（0.25A M-1）和低检出限（6.73 × 10(-10) M）。此外，纳米复合材料可以有效地降低干扰剂的影响，显著提高传感器在实际样品中检测BPA的实用性。
In this article, a highly sensitive electrochemical sensor is introduced for direct electro-oxidation of bisphenol A (BPA). The novel nanocomposite was prepared based on multi-walled carbon nanotube/thiol functionalised magnetic nanoparticles (Fe3O4-SH) as an immobilisation platform and gold nanoparticles (AuNPs) as an amplifying electrochemical signal. The chemisorbed AuNPs exhibited excellent electrochemical activity for the detection of BPA. Some analysing techniques such as Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy and energy-dispersive x-ray diffraction exposed the formation of nanocomposite. Under optimum conditions (pH 9), the sensor showed a linear range between 0.002-240M, with high sensitivity (0.25A M-1) along with low detection limit (6.73x10(-10) M). Moreover, nanocomposites could efficiently decrease the effect of interfering agents and remarkably enhance the utility of sensor at detection of BPA in some real samples.