Reduced Graphene Oxide/Carbon Nanotube/Gold Nanoparticles Nanocomposite Functionalized Screen‐Printed Electrode for Sensitive Electrochemical Detection of Endocrine Disruptor Bisphenol A |
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| Authors: | Yi‐Cheng Wang Dilek Cokeliler Sundaram Gunasekaran |
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| Affiliation: | 1. Department of Biological Systems Engineering, University of Wisconsin‐Madison, 460 Henry Mall, Madison, WI 53705, USA;2. Department of Biomedical Engineering, Baskent University, 06810, Baglica Campus, Ankara, Turkey |
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| Abstract: | We fabricated a highly sensitive electrochemical sensor for the determination of bisphenol A (BPA) in aqueous solution by using reduced graphene oxide (RGO), carbon nanotubes (CNT), and gold nanoparticles (AuNPs)‐modified screen‐printed electrode (SPE). GO/CNT nanocomposite was directly reduced to RGO/CNT on SPE at room temperature. AuNPs were then electrochemically deposited in situ on RGO/CNT‐modified SPE. Under optimized conditions, differential pulse voltammetry (DPV) produced linear current responses for BPA concentrations of 1.45 to 20 and 20 to 1,490 nM, with a calculated detection limit of an ultralow 800 pM. The sensor response was unaffected by the presence of interferents such as phenol, p‐nitrophenol, pyrocatechol, 2,4‐dinitrophenol, and hydroquinone. |
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| Keywords: | Environmental monitoring Food safety Graphene Electrodeposition Electrochemical reduction Electrochemical sensor |
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