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Title: | Graphene oxide electroreduced onto boron-doped diamond and electrodecorated with silver (Ag/GO/BDD) electrode for tetracycline detection in aqueous solution | Authors: | Negrea, Sorina Claudia Diaconu, Lidia Ani Nicorescu, Valeria Motoc, Sorina Orha, Corina Manea, Florica |
Affiliations: | National Research and Development Institute for Industrial Ecology, ECOIND National Research and Development Institute for Industrial Ecology, ECOIND National Research and Development Institute for Industrial Ecology, ECOIND “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy National Research and Development Institute in Electrochemistry and Condensed Matter Politehnica University of Timisoara |
Keywords: | Silver electrocatalyst;Tetracycline;Electrochemical detection;Silver-graphene oxideboron-doped diamond | Issue Date: | Jun-2021 | Publisher: | MDPI, Basel, Switzerland. | Abstract: | A new electrochemical sensor designed by modifying the commercial boron-doped diamond (BDD) electrode with graphene oxide (GO) reduced electrochemically and further electrodecorated with silver (Ag), named the Ag/GO/BDD electrode, was selected among a series of the BDD, GO electroreduced onto BDD (GO/BDD) and silver electrodeposited onto BDD (Ag/BDD) electrodes for the detection of tetracycline (TC) in aqueous solution. The best results regarding the sensitivity of 46.6 µA · µM −1 ·cm −2 and the lowest limit of detection of 5 nM was achieved using square-wave voltammetry (SWV) operated at the step potential of 5 mV, modulation amplitude of 200 mV, and the frequency of 10 Hz in alkaline medium. The application of the alkaline supporting electrolyte-based procedure is limited for water monitoring due to the presence of chloride that interferes with TC detection; however, it can be applied for the quantitative determination of pharmaceutical formulations. 0.1 M Na2SO4 supporting electrolyte eliminated chloride interference and can be used for the application of Ag/GO/BDD in practical detection of TC in water. |
Description: | Nanomaterials, 2021, vol. 11, 1566, https://doi.org/10.3390/nano11061566. |
URI: | http://hdl.handle.net/123456789/1787 |
Appears in Collections: | Articles |
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Graphene Oxide Electroreduced onto Boron Doped Diamond.pdf | Article | 5.72 MB | Adobe PDF | View/Open |
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