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Please use this identifier to cite or link to this item: https://dspace.ffh.bg.ac.rs/handle/123456789/2332
Title: Facile synthesis of Co/rGO, Au/rGO, and CoAu/rGO nanocomposites for precise determination of Arsenic(III) in water systems
Authors: Radinović, Kristina 
Milikić, Jadranka 
Gavrilov, Nemanja 
Stanković Dalibor
Basak Aleyna
Metin Önder
Šljukić Paunković, Biljana 
Keywords: cobalt; gold; reduced graphene oxide; arsenic; copper; electroanalytical sensing
Issue Date: 23-Sep-2024
Publisher: ELSEVIER
Project: Ministry of Science, Technological Development and Innovation of the Republic of Serbia
Fundação para a Ciência e a Tecnologia (FCT, Portugal)
Turkish Academy of Sciences (TUBA) for the partial financial support.
Abstract: 
Cobalt (Co), gold (Au), and cobalt-gold (CoAu) nanoparticles were deposited on reduced graphene oxide (rGO) by a facile and scalable procedure. The synthesised nanocomposites (Co/rGO, Au/rGO, and CoAu/rGO) were used as electrode materials for detecting trace amounts of arsenic (As(III)) ions in water samples. All three electrodes responded to the presence of As(III) in an acidic medium (different acids of the same concentration, then chosen acid at different concentrations). A detailed optimization of the conditions was continued with the CoAu/rGO electrode which showed the best response in terms of the best defined peak indicating the oxidation of As(0) to As(III) and the highest current. The electrode was tested in a wide range of concentrations (30–1000 µM), where two areas of linearity and limits of detection were obtained (for low- and high- concentrations). Moreover, this electrode showed the ability to detect As(III) ions in the presence of Cu(II), as an interference model as well as a satisfactory electrochemical response, in terms of a clear peak corresponding to the oxidation of As(0) to As(III) in a real sample.
URI: https://dspace.ffh.bg.ac.rs/handle/123456789/2332
DOI: 10.1016/j.electacta.2024.145147
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University of Belgrade
Faculty of Physical Chemistry
Studentski trg 12-16
11158 Belgrade 118
PAC 105305
SERBIA
University of Belgrade Faculty of Physical Chemistry