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Materials 2014, 7(8), 5789-5801; https://doi.org/10.3390/ma7085789

High Purity and Yield of Boron Nitride Nanotubes Using Amorphous Boron and a Nozzle-Type Reactor

1
Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI), 111-989 Daeduck-daero, Yuseong-gu, Daejeon-si 305-353, Korea
2
World Class Institute (WCI) Quantum Beam based Radiation Research Center, Korea Atomic Energy Research Institute, 111-989 Daeduck-daero, Yuseong-gu, Daejeon-si 305-353, Korea
3
Nuclear Technology Division, EnesG, 8 Techno10-ro, Yuseong-gu, Daejeon-si 305-510, Korea
4
Department of Nano Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu 143-747, Korea
5
Department of Physics, Hanyang University, 222 Wangsimliro, Sungdong-gu, Seoul 133-791, Korea
*
Authors to whom correspondence should be addressed.
Received: 1 July 2014 / Revised: 1 August 2014 / Accepted: 5 August 2014 / Published: 11 August 2014
(This article belongs to the Special Issue Compound Semiconductor Materials 2014)
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Abstract

Enhancement of the production yield of boron nitride nanotubes (BNNTs) with high purity was achieved using an amorphous boron-based precursor and a nozzle-type reactor. Use of a mixture of amorphous boron and Fe decreases the milling time for the preparation of the precursor for BNNTs synthesis, as well as the Fe impurity contained in the B/Fe interdiffused precursor nanoparticles by using a simple purification process. We also explored a nozzle-type reactor that increased the production yield of BNNTs compared to a conventional flow-through reactor. By using a nozzle-type reactor with amorphous boron-based precursor, the weight of the BNNTs sample after annealing was increased as much as 2.5-times with much less impurities compared to the case for the flow-through reactor with the crystalline boron-based precursor. Under the same experimental conditions, the yield and quantity of BNNTs were estimated as much as ~70% and ~1.15 g/batch for the former, while they are ~54% and 0.78 g/batch for the latter. View Full-Text
Keywords: boron nitride nanotubes (BNNTs); amorphous boron; ball milling; annealing; core-shell structure; seed nanoparticles boron nitride nanotubes (BNNTs); amorphous boron; ball milling; annealing; core-shell structure; seed nanoparticles
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Kim, J.; Seo, D.; Yoo, J.; Jeong, W.; Seo, Y.-S.; Kim, J. High Purity and Yield of Boron Nitride Nanotubes Using Amorphous Boron and a Nozzle-Type Reactor. Materials 2014, 7, 5789-5801.

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