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Investigation of Structure and Chemical Composition of Carbon Nanofibers Developed From Renewable Precursor
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. (Wood and bionanocomposites)ORCID iD: 0000-0002-1484-7224
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1776-2725
Fibre and Particle Engineering Research Unit, University of Oulu, Oulu, Finland.
Microelectronics Research Group, University of Oulu, Oulu, Finland.
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2019 (English)In: Frontiers in Materials, E-ISSN 2296-8016, Vol. 6, article id 334Article in journal (Refereed) Published
Abstract [en]

In this study, lignin-based carbon nanofibers were prepared by electrospinning, followed by carbonization at four different temperatures (800, 1,000, 1,200, and 1,400°C). The surface and bulk elemental compositions were analyzed by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy, respectively. In addition, the structure of the prepared carbon nanofibers was characterized by scanning electron microscopy, transmission electron microscopy, focused ion beam microscopy, and Raman spectroscopy. Results showed that all carbon nanofibers, irrespective of the carbonization temperature, had continuous and homogeneous structures. They were dense and no phase separation was observed. Moreover, the nanofibers carbonized at 800°C or 1,000°C predominately contained amorphous carbon and some non-carbon elements. When the carbonization was performed at a higher temperature (1,200°C or 1,400°C), non-carbon elements were effectively removed and nanocrystalline graphite was formed, indicating that high temperature carbonization facilitated the formation of ordered carbon structures.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2019. Vol. 6, article id 334
Keywords [en]
lignin, electrospinning, carbon nanofibers, renewable resources, microstructure
National Category
Materials Engineering Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-77510DOI: 10.3389/fmats.2019.00334ISI: 000505183400001OAI: oai:DiVA.org:ltu-77510DiVA, id: diva2:1388465
Funder
Swedish Research Council, Carbon Lignin 2017-04240Bio4Energy
Note

Validerad;2020;Nivå 2;2020-01-27 (johcin)

Available from: 2020-01-24 Created: 2020-01-24 Last updated: 2020-01-27Bibliographically approved

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Wei, JiayuanGeng, ShiyuOksman, Kristiina

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