In-situ tailoring of the electrocatalytic properties of screen-printed graphite electrodes with sparked generated molybdenum nanoparticles for the simultaneous voltammetric determination of sunset yellow and tartrazine

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00115122" target="_blank" >RIV/00216224:14310/20:00115122 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0925400519314674" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925400519314674</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2019.127268" target="_blank" >10.1016/j.snb.2019.127268</a>

Result language

angličtina

Original language name

In-situ tailoring of the electrocatalytic properties of screen-printed graphite electrodes with sparked generated molybdenum nanoparticles for the simultaneous voltammetric determination of sunset yellow and tartrazine

Original language description

This work describes the development of a “green” electrocatalytic surface based on molybdenum-sparked screen-printed graphite electrodes (sparked Mo-SPEs) for the voltammetric determination of azo synthetic colorants. Sparked Mo-SPEs were produced by an in-situ, liquid-free metal-to-SPE electric discharge approach at 1.2 kV under atmospheric conditions. Morphological studies with scanning electron microscopy and energy dispersive X-ray spectroscopy revealed the formation of Mo nanoparticles that have been evenly distributed over the entire surface of the electrodes. X-ray photoelectron spectroscopy showed that the atomic percentage of Mo over the electrode surface is only 0.5 ± 0.1% in the form of metallic Mo (25.3%) and Mo(VI) (74.7%). In 0.1 M acetate buffer solution, pH 5 sparked Mo-SPEs exhibited well-defined oxidation peaks at 0.730 V for sunset yellow (SY) and 0.973 V for tartrazine (TAR) versus Ag/AgCl/3 M KCl. Sparked Mo-SPE demonstrated remarkably increased responses compared with plain or electrodeposited MoxOy modified-graphite SPEs and enabled the simultaneous determination of the targets in the nano molar range. Under selected experimental variables a linear calibration curve over the concentration range from 5 to 250 nM SY/TAR was constructed. The limits of detection (S/N 3) were 2 nM. The response of Mo-SPE in the presence of other azo colorants was also investigated. The developed electrodes were successfully applied to the determination of SY and TAR in real-world samples. The accuracy of the method was established by recovery studies. Recovery was between 94–109%.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Sensors and Actuators B: Chemical

ISSN

0925-4005

e-ISSN

—

Volume of the periodical

304

Issue of the periodical within the volume

February 1

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

1-8

UT code for WoS article

000500702500087

EID of the result in the Scopus database

2-s2.0-85074225222