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.

Basic information

Original name

Preparation of polycrystalline tungsten nanofibers by needleless electrospinning

Authors

KUNDRÁT, Vojtěch (203 Czech Republic, belonging to the institution), Vít VYKOUKAL (203 Czech Republic, belonging to the institution), Zdeněk MORAVEC (203 Czech Republic, belonging to the institution), Lucie ŠIMONÍKOVÁ (203 Czech Republic, belonging to the institution), Karel NOVOTNÝ (203 Czech Republic, belonging to the institution) and Jiří PINKAS (203 Czech Republic, guarantor, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10403 Physical chemistry

Country of publisher

Switzerland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 6.200

RIV identification code

RIV/00216224:14310/22:00125402

Organization unit

Faculty of Science

DOI

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

UT WoS

000749700700003

Keywords in English

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

Abstract

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.

Links

LM2018127, research and development project

Name: Česká infrastruktura pro integrativní strukturní biologii (Acronym: CIISB)

Investor: Ministry of Education, Youth and Sports of the CR

90110, large research infrastructures

Name: CzechNanoLab

Citovat

KUNDRÁT, Vojtěch, Vít VYKOUKAL, Zdeněk MORAVEC, Lucie ŠIMONÍKOVÁ, Karel NOVOTNÝ and Jiří PINKAS. Preparation of polycrystalline tungsten nanofibers by needleless electrospinning. Journal of Alloys and Compounds. Elsevier, 2022, vol. 900, April, p. "163542", 11 pp. ISSN 0925-8388. Available from: 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 and Jiří PINKAS. Preparation of polycrystalline tungsten nanofibers by needleless electrospinning. \textit{Journal of Alloys and Compounds}. Elsevier, 2022, vol.~900, April, p.~''163542'', 11 pp. ISSN~0925-8388. Available from: https://dx.doi.org/10.1016/j.jallcom.2021.163542.

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