Issue 6, 2013

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
19 10 2012
Accepted
30 11 2012
First published
03 12 2012

J. Mater. Chem. A, 2013,1, 1976-1981

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

S. Kim, H. Cho, M. J. Kim, H. Lee, J. Park, Y. Lee, H. C. Kim, C. W. Yoon, S. W. Nam and S. O. Kang, J. Mater. Chem. A, 2013, 1, 1976 DOI: 10.1039/C2TA00758D

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