Preparation of polycrystalline tungsten nanofibers by
needleless electrospinning

J 2022

Preparation of polycrystalline tungsten nanofibers by needleless electrospinning

KUNDRÁT, Vojtěch, Vít VYKOUKAL, Zdeněk MORAVEC, Lucie ŠIMONÍKOVÁ, Karel NOVOTNÝ et. al.

Základní údaje

Originální název

Preparation of polycrystalline tungsten nanofibers by needleless electrospinning

Autoři

KUNDRÁT, Vojtěch (203 Česká republika, domácí), Vít VYKOUKAL (203 Česká republika, domácí), Zdeněk MORAVEC (203 Česká republika, domácí), Lucie ŠIMONÍKOVÁ (203 Česká republika, domácí), Karel NOVOTNÝ (203 Česká republika, domácí) a Jiří PINKAS (203 Česká republika, garant, domácí)

Vydání

Journal of Alloys and Compounds, Elsevier, 2022, 0925-8388

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10403 Physical chemistry

Stát vydavatele

Švýcarsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 6.200

Kód RIV

RIV/00216224:14310/22:00125402

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1016/j.jallcom.2021.163542

UT WoS

000749700700003

Klíčová slova anglicky

Electrospinning; Tungsten; Metal; Silicotungstic Acid; Polyvinyl alcohol; Nanofibers

Štítky

CF CRYO, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 20. 5. 2022 11:33, prof. RNDr. Jiří Pinkas, Ph.D.

Anotace

V originále

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.

Návaznosti

LM2018127, projekt VaV

Název: Česká infrastruktura pro integrativní strukturní biologii (Akronym: CIISB)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Czech Infrastructure for Integrative Structural Biology

90110, velká výzkumná infrastruktura

Název: CzechNanoLab

Citovat

KUNDRÁT, Vojtěch, Vít VYKOUKAL, Zdeněk MORAVEC, Lucie ŠIMONÍKOVÁ, Karel NOVOTNÝ a Jiří PINKAS. Preparation of polycrystalline tungsten nanofibers by needleless electrospinning. 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.

@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. \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.

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