Shape manipulation of porous CeO nanofibers: facile fabrication, growth mechanism and catalytic elimination of soot particulates
Journal of Materials Science, ISSN: 1573-4803, Vol: 54, Issue: 14, Page: 10141-10152
2019
- 20Citations
- 18Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
In this work, shape manipulation in porous CeO nanofibers was successfully achieved by a simple electrospinning technology with high quality and high reproducibility. By simply tuning the electric field strength during electrospinning, the diameter of as-spun nanofibers composed of Ce(acac) and polyvinylpyrrolidone can be precisely controlled. As a result, the morphology of nanofibers can change from columnar to celery-like and belt-like structure. The formation mechanism of this intriguing diameter-dependent morphology can be assigned to the gradient evaporation of solvent across the nanofiber. After calcination at 500 °C, porous CeO nanofibers were obtained, showing unusually observed celery-like or belt-like morphologies. These intriguing CeO nanofibers exhibited good thermal stability in terms of phase structures and morphologies up to 700 °C. The fibrous CeO mats were active toward soot combustion with decreased activation energy, compared with commercial samples. Among three kinds of shapes, the fibrous CeO mats made of columnar-like nanofibers were endowed with the lowest activation energy of 120.1 kJ/mol, due to the most effective contact between soot and CeO surface, regardless a loose contact mode.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85065045814&origin=inward; http://dx.doi.org/10.1007/s10853-019-03648-9; http://link.springer.com/10.1007/s10853-019-03648-9; http://link.springer.com/content/pdf/10.1007/s10853-019-03648-9.pdf; http://link.springer.com/article/10.1007/s10853-019-03648-9/fulltext.html; https://dx.doi.org/10.1007/s10853-019-03648-9; https://link.springer.com/article/10.1007/s10853-019-03648-9
Springer Science and Business Media LLC
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