Efficient catalytic conversion of ammonia borane to borazine and its use for hexagonal boron nitride (white graphene)

Title
Efficient catalytic conversion of ammonia borane to borazine and its use for hexagonal boron nitride (white graphene)
Authors
김성관조현진김명종이희준박진형이영부김환철윤창원남석우강상욱
Keywords
Boron Nitride; White Graphene; Borazine; Ammonia Borane; CVD
Issue Date
2013-02
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 1, NO 6, 1976-1981
Abstract
Nickel nanoparticles (NiNPs) prepared in tetraglyme (TG) efficiently catalyzed the conversion of ammonia borane (AB, NH3BH3) to borazine (B3N3H6). Under the optimized conditions, 3 mol% of the NiNPs were introduced into a 1.5 M AB solution in TG and held at 80 °C for 6 h under a dynamic vacuum that was maintained at 30 torr. Borazine was isolated through a series of −45 °C, −78 °C, and −196 °C traps to give (−78 °C trap) pure borazine in 53% yield. The borazine produced was then utilized as a molecular precursor for high quality h-BN (white graphene) and large area h-BN sheets were prepared by applying low pressure chemical vapor deposition (LPCVD). Ultra-thin (single to few layers) h-BN was synthesized on Ni foil at the optimal ratio between borazine and NH3, and the number of layers was tuned by varying the NH3 partial pressure.
URI
http://pubs.kist.re.kr/handle/201004/44545
ISSN
20507488
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KIST Publication > Article
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