Single- and double-walled boron nitride nanotubes: Controlled synthesis and application for water purification

Title
Single- and double-walled boron nitride nanotubes: Controlled synthesis and application for water purification
Authors
이헌수장세규조현진김준희황재훈김철상박철김명종
Keywords
boron nitride; growth; high temperature; high pressure; synthesis
Issue Date
2020-05
Publisher
Scientific Reports
Citation
VOL 10, 7416
Abstract
Research interest in boron nitride nanotubes (BNNTs) has increased after the recent success of largescale BNNT syntheses using high-temperature-pressure laser ablation or high-temperature plasma methods. Nonetheless, there are limits to the application and commercialization of these materials because of the difficulties associated with their fine structural control. Herein, the growth kinetics of BNNTs were systemically studied for this purpose. The growth pressure of the nitrogen feed gas was varied while the growth temperature remained constant, which was confirmed by black body radiation measurements and calculations based on a heat loss model. Changing from the diffusion-limited regime to the supply-limited regime of growth kinetics based on the optimized BNNT synthesis condition afforded the control of the number of BNNT walls. The total amount of BNNTs possessing single and double walls was over 70%, and the BNNT surface area increased to 278.2 m2/g corresponding to small wall numbers and diameters. Taking advantage of the large surface area and high-temperature durability of the material, BNNTs utilized as a recyclable adsorbent for water purification. The efficiency of the BNNTs for capturing methylene blue particles in water was approximately 94%, even after three repetition cycles, showing the potential of the material for application in the filter industry.
URI
http://pubs.kist.re.kr/handle/201004/71417
ISSN
2045-2322
Appears in Collections:
KIST Publication > Article
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