Generation of graphite nanomaterials from pencil leads with the aid of a 3D positioning sparking device: Application to the voltammetric determination of nitroaromatic explosives

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00115343" target="_blank" >RIV/00216224:14310/20:00115343 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925400520302185" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925400520302185</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2020.127871" target="_blank" >10.1016/j.snb.2020.127871</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Generation of graphite nanomaterials from pencil leads with the aid of a 3D positioning sparking device: Application to the voltammetric determination of nitroaromatic explosives

Popis výsledku v původním jazyce

We report on facile generation of graphite nanomaterials (GNMs) with advanced electro catalytic propertiesthrough a direct electric discharge process between pencil leads and graphite screen-printed electrodes (SPEs)at ambient conditions at 1.2 kV. Various commercially available pencil leads of different degrees of hardnesswere examined. Sparked GNM-SPEs were characterized by Raman spectroscopy, SEM, CV, and EIS. Taking ascriterion the highest response to the electro-reduction of nitro group of 2,4,6-trinitrotoluene (TNT) at-0.3 Vat deoxygenated solutions, Castell 9000 (2B) pencil was selected as optimum. GNM-SPEs exhibited a linearresponse over the concentration range 1-100 ppb TNT, while the limit of detection (LOD) based on the 3sigma/mcriterion was calculated 0.44 ppb. The interference effect of other nitro-aromatic explosives and maskingcompounds, which are used to hinder the detection of TNT, was extensively investigated. The determination ofTNT was also achieved by measuring the oxidation of the electrochemically generated hydroxylamine groups. Inthis format, each measurement was conducted with a new electrode polarized at-0.275 V for 2 min. At the costof a slightly increased time of analysis, the anodic determination of TNT offered increased selectivity, applic-ability in non-deoxygenated solutions, linear response over the concentration range 1-50 ppb TNT and anLOD of 0.25 ppb. GNM-SPEs were successfully applied to the determination of TNT in spiked drinking watersamples. Recovery was 101-108 %.

Název v anglickém jazyce

Generation of graphite nanomaterials from pencil leads with the aid of a 3D positioning sparking device: Application to the voltammetric determination of nitroaromatic explosives

Popis výsledku anglicky

We report on facile generation of graphite nanomaterials (GNMs) with advanced electro catalytic propertiesthrough a direct electric discharge process between pencil leads and graphite screen-printed electrodes (SPEs)at ambient conditions at 1.2 kV. Various commercially available pencil leads of different degrees of hardnesswere examined. Sparked GNM-SPEs were characterized by Raman spectroscopy, SEM, CV, and EIS. Taking ascriterion the highest response to the electro-reduction of nitro group of 2,4,6-trinitrotoluene (TNT) at-0.3 Vat deoxygenated solutions, Castell 9000 (2B) pencil was selected as optimum. GNM-SPEs exhibited a linearresponse over the concentration range 1-100 ppb TNT, while the limit of detection (LOD) based on the 3sigma/mcriterion was calculated 0.44 ppb. The interference effect of other nitro-aromatic explosives and maskingcompounds, which are used to hinder the detection of TNT, was extensively investigated. The determination ofTNT was also achieved by measuring the oxidation of the electrochemically generated hydroxylamine groups. Inthis format, each measurement was conducted with a new electrode polarized at-0.275 V for 2 min. At the costof a slightly increased time of analysis, the anodic determination of TNT offered increased selectivity, applic-ability in non-deoxygenated solutions, linear response over the concentration range 1-50 ppb TNT and anLOD of 0.25 ppb. GNM-SPEs were successfully applied to the determination of TNT in spiked drinking watersamples. Recovery was 101-108 %.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors and Actuators B: Chemical

ISSN

0925-4005

e-ISSN

—

Svazek periodika

310

Číslo periodika v rámci svazku

127871

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000519306300028

EID výsledku v databázi Scopus

2-s2.0-85079558587