| KUNDRÁT, Vojtěch, Vít VYKOUKAL, Zdeněk MORAVEC, Lucie ŠIMONÍKOVÁ, Karel NOVOTNÝ a Jiří PINKAS. Preparation of polycrystalline tungsten nanofibers by needleless electrospinning. Online. Journal of Alloys and Compounds. Elsevier, 2022, roč. 900, April, s. "163542", 11 s. ISSN 0925-8388. Dostupné z: https://dx.doi.org/10.1016/j.jallcom.2021.163542. [citováno 2024-04-23] |
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@article{1835098,
author = {Kundrát, Vojtěch and Vykoukal, Vít and Moravec, Zdeněk and Šimoníková, Lucie and Novotný, Karel and Pinkas, Jiří},
article_number = {April},
doi = {http://dx.doi.org/10.1016/j.jallcom.2021.163542},
keywords = {Electrospinning; Tungsten; Metal; Silicotungstic Acid; Polyvinyl alcohol; Nanofibers},
language = {eng},
issn = {0925-8388},
journal = {Journal of Alloys and Compounds},
title = {Preparation of polycrystalline tungsten nanofibers by needleless electrospinning},
url = {https://www.sciencedirect.com/science/article/pii/S0925838821049525#!},
volume = {900},
year = {2022}
}
TY - JOUR
ID - 1835098
AU - Kundrát, Vojtěch - Vykoukal, Vít - Moravec, Zdeněk - Šimoníková, Lucie - Novotný, Karel - Pinkas, Jiří
PY - 2022
TI - Preparation of polycrystalline tungsten nanofibers by needleless electrospinning
JF - Journal of Alloys and Compounds
VL - 900
IS - April
SP - "163542"
EP - "163542"
PB - Elsevier
SN - 09258388
KW - Electrospinning
KW - Tungsten
KW - Metal
KW - Silicotungstic Acid
KW - Polyvinyl alcohol
KW - Nanofibers
UR - https://www.sciencedirect.com/science/article/pii/S0925838821049525#!
N2 - One-dimensional metal nanostructures are of great interest for applications in electronic and micromechanical devices, solar cells, sensors, and heterogeneous (photo)catalysts. We describe the multigram preparation method for nanoscopic tungsten fibers (diameter 107 +/- 49 nm) for the first time. The material was prepared by needleless electrospinning from an aqueous polyvinyl alcohol and silicotungstic acid solution. A green fibrous composite mat was calcined in air to WO3/SiO2 fibers and further reduced in forming gas at various temperatures (500-1000 degrees C). The reduction process proceeded from nanofibrous blue tungsten oxide to mixtures of reduced tungsten oxides with metallic tungsten and finally at 800 degrees C to pure metallic W in the form of polycrystalline fibers. These nanofibers consist of individual tungsten nanoparticles covered and interconnected by amorphous silica. All prepared materials were characterized by the TG-DSC, TG-DTA, SEM, TEM, STEM-EDS, and XRD methods. This optimized fabrication method could be scaled up to supply ample amounts of metallic tungsten nanofibers for future applications.
ER -
KUNDRÁT, Vojtěch, Vít VYKOUKAL, Zdeněk MORAVEC, Lucie ŠIMONÍKOVÁ, Karel NOVOTNÝ a Jiří PINKAS. Preparation of polycrystalline tungsten nanofibers by needleless electrospinning. Online. \textit{Journal of Alloys and Compounds}. Elsevier, 2022, roč.~900, April, s.~''163542'', 11 s. ISSN~0925-8388. Dostupné z: https://dx.doi.org/10.1016/j.jallcom.2021.163542. [citováno 2024-04-23]
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