Electrochemical detection of 4,4',5,5'-tetranitro-1H,1'H-2,2'-biimidazole on boron-doped diamond/graphene nanowall electrodes
Anna Dettlaff , Paweł Jakóbczyk , Michał Sobaszek , Mateusz Ficek , Barlomiej Dec , Aneta Łuczkiewicz , Mateusz Szala , Jacek Wojtas , Tadeusz Ossowski , Robert Bogdanowicz
AbstractWe present a promising approach to the electroanalytical detection of a specific nitroaromatic explosive in landfill leachates (LLs) that originated from a municipal solid waste plant. The paper is focused but not limited to the sensing of 4,4',5,5'-tetranitro-1H,1'H-2,2'-biimidazole (TNBI) using differential pulse voltammetry and cyclic voltammetry. Highly electroactive nanocarbon was applied to determine low concentrations of the analyte in the complex interfering matrix as leachate samples. The mechanism of nitro- group reduction is attributed to the sensing effect, as revealed in the voltammograms of TNBI. The developed sensor model has two linear regions extending from 0.02 ppm to 1.4 ppm and from 2 ppm to 16 ppm resulting from adsorption and diffusion-controlled processes, respectively. The limit of detection was as low as 0.52 ppm (1.66 μM L-1) thanks to the electrochemical performance of the joint effect of the diamond/graphene composite nanowall surface.
|Journal series||IEEE Sensors Journal, ISSN 1530-437X, e-ISSN 1558-1748, (N/A 100 pkt)|
|Publication size in sheets||0.3|
|Keywords in English||differential pulse voltammetry, nanocarbon electrodes, nitroaromatics, electrochemical sensor|
|Score||= 100.0, 27-04-2020, ArticleFromJournal|
|Publication indicators||: 2018 = 1.709; : 2018 = 3.076 (2) - 2018=3.115 (5)|
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