Purification of boron nitride nanotubes by functionalization and removal of poly(4-vinylpyridine)

[Display omitted] •A simple and efficient purification process.•The purification process uses non-covalent interactions between pyridine and boron.•The purification process uses the Poly(4-vinylpyridine) for the functionalization.•Selectively separate impurities from BNNTs via the solution process.•...

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Bibliographic Details
Published in:Applied surface science 2021-07, Vol.555, p.149722, Article 149722
Main Authors: Lee, Soul-Hee, Kang, Minsung, Lim, Hongjin, Moon, Se Youn, Kim, Myung Jong, Jang, Se Gyu, Lee, Hyo Joong, Cho, Hyunjin, Ahn, Seokhoon
Format: Article
Language:English
Subjects:
Acid-base reaction
BNNT
Poly(4-vinylpyridine)
Purification
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Summary:[Display omitted] •A simple and efficient purification process.•The purification process uses non-covalent interactions between pyridine and boron.•The purification process uses the Poly(4-vinylpyridine) for the functionalization.•Selectively separate impurities from BNNTs via the solution process.•Easily removed from BNNTs surface through simple acid treatment. BNNTs were functionalized by using a polymer that includes a pyridine group, which can undergo dipole interactions with boron atoms in BNNTs. The functionalized BNNTs were well-dispersed in an alcohol solvent, whereas hexagonal boron nitride impurities precipitated, due presumably to stacked structures. After purification processes, acid was added to a solution that contained functionalized BNNTs to prevent pyridine-boron interactions through stronger acid-base interactions. Thus, the polymer bound to the BNNTs was easily separated, and purified BNNTs could be obtained using a solution process.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2021.149722