Investigation of structure and chemical composition of carbon nanofibers developed from renewable precursor
Wei, Jiayuan; Geng, Shiyu; Kumar, Manish; Pitkänen, Olli; Hietala, Maiju; Oksman, Kristiina (2019-12-19)
Wei, J., Geng, S., Kumar, M., Pitkänen, O., Hietala, M., & Oksman, K. (2019). Investigation of Structure and Chemical Composition of Carbon Nanofibers Developed From Renewable Precursor. Frontiers in Materials, 6. https://doi.org/10.3389/fmats.2019.00334
© 2019 Wei, Geng, Kumar, Pitkänen, Hietala and Oksman. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe202003026920
Tiivistelmä
Abstract
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.
Kokoelmat
- Avoin saatavuus [31657]