Electrochemical Detection of 4,4’,5,5’-Tetranitro-1H,1’H-2,2’-Biimidazole on Boron-Doped Diamond/Graphene Nanowall Electrodes
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2020-02-12 |
| Journal | IEEE Sensors Journal |
| Authors | Anna Dettlaff, Paweł Jakóbczyk, Michał Sobaszek, Mateusz Ficek, Bartłomiej Dec |
| Institutions | Military University of Technology in Warsaw, University of Gdańsk |
| Citations | 10 |
Abstract
Section titled “Abstract”We 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 nitrogroup 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 <sup xmlns:mml=“http://www.w3.org/1998/Math/MathML” xmlns:xlink=“http://www.w3.org/1999/xlink”>-1</sup> ) thanks to the electrochemical performance of the joint effect of the diamond/graphene composite nanowall surface.