High Purity and Yield of Boron Nitride Nanotubes Using Amorphous Boron and a Nozzle-Type Reactor
by
Jaewoo Kim 1,2,*, Duckbong Seo 3, Jeseung Yoo 1,4, Wanseop Jeong 5, Young-Soo Seo 4,* and Jaeyong Kim 5
Jaewoo Kim 1,2,*, Duckbong Seo 3, Jeseung Yoo 1,4, Wanseop Jeong 5, Young-Soo Seo 4,* and Jaeyong Kim 5
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.
Materials 2014, 7(8), 5789-5801; https://doi.org/10.3390/ma7085789
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)
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.
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Keywords:
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
MDPI and ACS Style
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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