Hydrogen-Catalyzed, Pilot-Scale Production of Small-Diameter Boron Nitride Nanotubes and Their Macroscopic Assemblies
| العنوان: | Hydrogen-Catalyzed, Pilot-Scale Production of Small-Diameter Boron Nitride Nanotubes and Their Macroscopic Assemblies |
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| المؤلفون: | Mark Plunkett, Michael B. Jakubinek, Benoit Simard, Amy Hrdina, Jingwen Guan, Christopher T. Kingston, Keun Su Kim |
| المصدر: | ACS Nano. 8:6211-6220 |
| بيانات النشر: | American Chemical Society (ACS), 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Fabrication, Materials science, Boron nitride nanotubes (BNNTs), Hydrogen, Assembly, Carbon nanotubes, Nucleation, General Physics and Astronomy, chemistry.chemical_element, Nanotechnology, Carbon nanotube, High quality, law.invention, Catalysis, chemistry.chemical_compound, law, Phase (matter), General Materials Science, Thin film, General Engineering, Hexagonal boron nitride, Boron nitride, chemistry, Plasmas, large scale, Pilot-scale production, Induction thermal plasma |
| الوصف: | Boron nitride nanotubes (BNNTs) exhibit a range of properties that are as compelling as those of carbon nanotubes (CNTs); however, very low production volumes have prevented the science and technology of BNNTs from evolving at even a fraction of the pace of CNTs. Here we report the high-yield production of small-diameter BNNTs from pure hexagonal boron nitride powder in an induction thermal plasma process. Few-walled, highly crystalline small-diameter BNNTs (∼5 nm) are produced exclusively and at an unprecedentedly high rate approaching 20 g/h, without the need for metal catalysts. An exceptionally high cooling rate (∼105 K/s) in the induction plasma provides a strong driving force for the abundant nucleation of small-sized B droplets, which are known as effective precursors for small-diameter BNNTs. It is also found that the addition of hydrogen to the reactant gases is crucial for achieving such high-quality, high-yield growth of BNNTs. In the plasma process, hydrogen inhibits the formation of N2 from N radicals and promotes the creation of B-N-H intermediate species, which provide faster chemical pathways to the re-formation of a h-BN-like phase in comparison to nitridation from N2. We also demonstrate the fabrication of macroscopic BNNT assemblies such as yarns, sheets, buckypapers, and transparent thin films at large scales. These findings represent a seminal milestone toward the exploitation of BNNTs in real-world applications. © Published 2014 by the American Chemical Society. |
| تدمد: | 1936-086X 1936-0851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4499a0481363963c324540a4dd56144 https://doi.org/10.1021/nn501661p |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....c4499a0481363963c324540a4dd56144 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 1936086X 19360851 |
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