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@article{1828397,
author = {Medvecka, Veronika and Surovčík, Juraj and Roch, Tomáš and Zahoran, Miroslav and Pavliňák, David and Kováčik, Dušan},
article_number = {April},
doi = {http://dx.doi.org/10.1016/j.apsusc.2021.152384},
keywords = {ZnO nanofibers; Plasma assisted calcination; Coplanar discharge; Photocatalytic properties},
language = {eng},
issn = {0169-4332},
journal = {Applied Surface Science},
title = {ZnO nanofibers prepared by plasma assisted calcination: Characterization and photocatalytic properties},
url = {https://doi.org/10.1016/j.apsusc.2021.152384},
volume = {581},
year = {2022}
}
TY - JOUR
ID - 1828397
AU - Medvecka, Veronika - Surovčík, Juraj - Roch, Tomáš - Zahoran, Miroslav - Pavliňák, David - Kováčik, Dušan
PY - 2022
TI - ZnO nanofibers prepared by plasma assisted calcination: Characterization and photocatalytic properties
JF - Applied Surface Science
VL - 581
IS - April
SP - 152384
EP - 152384
PB - Elsevier
SN - 01694332
KW - ZnO nanofibers
KW - Plasma assisted calcination
KW - Coplanar discharge
KW - Photocatalytic properties
UR - https://doi.org/10.1016/j.apsusc.2021.152384
N2 - The ZnO nanofibers (ZnO-NF) have been fabricated by the novel approach of plasma assisted calcination using the low-temperature atmospheric pressure plasma generated by diffuse coplanar surface barrier discharge (DCSBD). The electrospun polyvinyl pyrrolidone/zinc acetate fibers were exposed to DCSBD plasma before the thermal processing at different temperatures (400 °C,500 °C and 600 °C) and characterized in term of chemical composition and morphological structure by ATR-FTIR, XPS, SEM, XRD, and BET analysis. The photocatalytic activity of prepared ZnO-NF has been investigated under UV-radiation using methylene blue and the kinetics of photodegradation and reusability were studied. The results showed that initial removal of organic matrix at low-temperature by application of plasma leads to better formation of Zn-O even at lower calcination temperature. The plasma pre-treated (PT) fibers exhibit lower diameter of final products and helps to preserve a well-defined fibrous structure during thermal processing. The ZnO-NF prepared by a combination of plasma treatment and thermal processing showed significantly higher photodegradation activity and the difference was higher with decreasing calcination temperature. The highest rate constants were reached for fibers calcined at 600 °C with and without plasma treatment – kPT = 0.0149 min−1, kNT = 0.0107 min−1, respectively. The slight improvement of re-usability in cyclic photodegradation was observed on samples calcined at 600 °C.
ER -
MEDVECKA, Veronika, Juraj SUROVČÍK, Tomáš ROCH, Miroslav ZAHORAN, David PAVLIŇÁK a Dušan KOVÁČIK. ZnO nanofibers prepared by plasma assisted calcination: Characterization and photocatalytic properties. \textit{Applied Surface Science}. Elsevier, 2022, roč.~581, April, s.~152384-152393. ISSN~0169-4332. Dostupné z: https://dx.doi.org/10.1016/j.apsusc.2021.152384.
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