Designing and fabrication of a novel gold nanocomposite structure: application in electrochemical sensing of bisphenol A. Issue 9 (15th July 2018)

• Record Type: Journal Article
• Authors: Baghayeri, Mehdi; Ansari, Reza; Nodehi, Marzieh; Veisi, Hojat
• Is Part Of: International journal of environmental analytical chemistry. Volume 98:Issue 9(2018)
• Page Start: 874
• Page End: 888
• Publication Date: 2018-07-15
• Subjects: Gold nanoparticle -- bisphenol A -- electrochemical behaviour -- immobilisation platform -- sensors; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2018.1512595
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: 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 (Fe3 O4 -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 0.002–240 μM, with high sensitivity (0.25 μA μM −1 ) along with low detection limit (6.73 × 10 −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.