Synthesis of a hierarchically structured Fe3O4-PEI nanocomposite for the highly sensitive electrochemical determination of bisphenol A in real samples
- Authors
- Ramu, A. G.; Telmenbayar, L.; Theerthagiri, J.; Yang, D.; Song, M.; Choi, Dongjin
- Issue Date
- 21-Nov-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NEW JOURNAL OF CHEMISTRY, v.44, no.43, pp.18633 - 18645
- Journal Title
- NEW JOURNAL OF CHEMISTRY
- Volume
- 44
- Number
- 43
- Start Page
- 18633
- End Page
- 18645
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/11458
- DOI
- 10.1039/d0nj03830j
- ISSN
- 1144-0546
- Abstract
- In this work, a novel, highly sensitive and cost-effective sensing electrode was fabricated for the sensitive detection of bisphenol A in milk and water samples. An eco-catalyst Fe3O4-PEI nanocomposite was successfully synthesized using a hydrothermal method. XRD, XPS, TEM, FE-SEM, FTIR spectroscopy and a Zetasizer were employed to analyse the morphology, elemental composition and surface charge of the Fe3O4-PEI nanocomposite. A simple cyclic voltammetry technique was used for the sensitive detection of BPA on the Fe3O4-PEI/C electrode. The positive surface charge of the composite remarkably enhanced the sensitivity toward BPA. Under optimized conditions, the Fe3O4-PEI/C electrode showed high electrochemical sensitivity and good catalytic activity toward BPA. A wide linear sensitivity range from 0.01 mu M to 50 mu M with a high correlation coefficient of 0.99524 and a limit of detection (LOD) of 3.2 nM (S/N = 3) toward BPA were obtained for the Fe3O4-PEI/C electrode. The proposed electrode (Fe3O4-PEI/C) successfully detected BPA in milk and water samples with high recovery percentages of 100.9% and 100.5%, respectively. The results obtained using the proposed electrode (Fe3O4-PEI/C) correlated well with GC-MS data for real samples. A novel Fe3O4-PEI/C electrode exhibited high sensitivity, stability, and selectivity in BPA detection. Fe3O4-PEI/C shows high electrochemical activity toward 2,4-dinitrophenol as well. The proposed Fe3O4-PEI/C electrode is a highly convenient tool for the simultaneous detection of BPA and other phenolic compounds in real samples.
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