Ultra-sensitive electroanalysis of toxic 2,4-DNT on o-CoxFe1-xSe2 solid solution: Fe-doping-induced c-CoSe2 phase transition to form electron-rich active sites

Xu, Xia; Liu, Zheng; Xu, Qianqian; Cheng, Xing-Liang; Li, Junjie; Li, Shanshan

doi:10.1016/j.aca.2022.340291

Cited by 8 publications

(3 citation statements)

References 55 publications

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“…Only one peak associated with DNT was observed in the cathodic sweep in the H 2 SO 4 system which is different from additional peaks reported in other systems. 43,44 Experiments were conducted in acetonitrile with the added 0.1 M sodium perchlorate supporting electrolyte, 100 ppm of 2,4-DNT, and 2,6-DNT separately. Figure 5 reveals separate reduction peaks associated with the two nitro groups of 2,4-DNT and 2,6-DNT.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…They also have many advantages such as broad linear dynamic range, cost-effectiveness, high accuracy, low limit of detection, direct determination of analyte, rapid response, and miniaturization . Current electrochemical sensors for 2,4-DNT reported in the literature often utilize complex modifications to the electrode surface and electrode (surface) renewal, alongside electrolyte systems that differ substantially from the sample matrix. − Electrode replacement, reuse, and reduced sample processing for direct analysis in the field remain challenging. The use of complex nanocatalysts typically improves the detection of the analyte by increasing the dissociation and transport of charged particles, while also increasing the electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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Pencil and Gold Electrode Materials for the Electrochemical Study and Analysis of Dinitrotoluene

Kurian,

De Maere,

Schazmann

2024

ACS Omega

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The aim of our work was to investigate practical and robust methods for the electrochemical analysis of DNT. Using gold WEs, we differentiated between the nitro substituents in 2,4-and 2,6-DNT in organic electrolyte systems. Switching to an aqueous electrolyte (2 M H 2 SO 4 ), a limit of detection (LOD) of 0.158 ppm (0.87 μM) and a limit of quantitation (LOQ) of 0.48 ppm (2.64 μM) were observed for 2,4-DNT. Subsequent simplification to wooden craft pencils as WEs in aqueous 2 M H 2 SO 4 electrolyte achieved a LOD of 4.8 ppm (26.48 μM) and a LOQ of 14.6 ppm (80.54 μM) for 2,4-DNT. Alongside this easily renewable WE choice, 2 M H 2 SO 4 was found to improve the solubility of DNT in aqueous media and has not been previously reported as an electrolyte in DNT electroanalysis. On testing a range of pencil grades from 4H to 8B, it was found that 4B gave the best sensitivity. The work serves as a preliminary study into materials that, through their simplicity and availability, may be suitable for the development of a robust and portable instrumental method through the electrochemical work presented here.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pencil and Gold Electrode Materials for the Electrochemical Study and Analysis of Dinitrotoluene

Kurian,

De Maere,

Schazmann

2024

ACS Omega

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“…IGTMSes exhibit excellent performance in electrochemistry and battery energy storage, but they also exhibit exciting performance in chemical detection. For example, Xia et al 78 used Fe-doping-induced structural phase transformation engineering to change c -CoSe 2 into o -CoSe 2 , which was accompanied by the formation of o -Co x Fe 1-x Se 2 solid solution (Fig. 7h).…”

Section: Phase Engineering Of Igtmsesmentioning

confidence: 99%