| KOLOZOF, Penthesilia-Amalia, Angeliki B. FLOROU, Konstantinos SPYROU, Jan HRBÁČ a Mamas PRODROMIDIS. 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. Sensors and Actuators B: Chemical. Lausanne: Elsevier, 2020, roč. 304, February 1, s. 1-8. ISSN 0925-4005. Dostupné z: https://dx.doi.org/10.1016/j.snb.2019.127268. |
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@article{1576017,
author = {Kolozof, PenthesiliaandAmalia and Florou, Angeliki B. and Spyrou, Konstantinos and Hrbáč, Jan and Prodromidis, Mamas},
article_location = {Lausanne},
article_number = {February 1},
doi = {http://dx.doi.org/10.1016/j.snb.2019.127268},
keywords = {Molybdenum nanoparticles; Sparked screen-printed electrodes; Sunset yellow; Tartrazine; Determination of organic synthetic azo dyes},
language = {eng},
issn = {0925-4005},
journal = {Sensors and Actuators B: Chemical},
title = {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},
url = {https://www.sciencedirect.com/science/article/pii/S0925400519314674},
volume = {304},
year = {2020}
}
TY - JOUR
ID - 1576017
AU - Kolozof, Penthesilia-Amalia - Florou, Angeliki B. - Spyrou, Konstantinos - Hrbáč, Jan - Prodromidis, Mamas
PY - 2020
TI - 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
JF - Sensors and Actuators B: Chemical
VL - 304
IS - February 1
SP - 1-8
EP - 1-8
PB - Elsevier
SN - 09254005
KW - Molybdenum nanoparticles
KW - Sparked screen-printed electrodes
KW - Sunset yellow
KW - Tartrazine
KW - Determination of organic synthetic azo dyes
UR - https://www.sciencedirect.com/science/article/pii/S0925400519314674
L2 - https://www.sciencedirect.com/science/article/pii/S0925400519314674
N2 - 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%.
ER -
KOLOZOF, Penthesilia-Amalia, Angeliki B. FLOROU, Konstantinos SPYROU, Jan HRBÁČ a Mamas PRODROMIDIS. 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. \textit{Sensors and Actuators B: Chemical}. Lausanne: Elsevier, 2020, roč.~304, February 1, s.~1-8. ISSN~0925-4005. Dostupné z: https://dx.doi.org/10.1016/j.snb.2019.127268.
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