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

Sung Kwan Kim, Hyunjin Cho, Myung Jong Kim, Hee Jun Lee, Jin Hyung Park, Young Boo Lee, Hwan Chul Kim, Chang Won Yoon, SukWoo Nam, Sang Ook Kang

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32 Citations (Scopus)

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. This journal is

Original languageEnglish
Pages (from-to)1976-1981
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number6
DOIs
Publication statusPublished - 2013 Feb 14
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Kim, S. K., Cho, H., Kim, M. J., Lee, H. J., Park, J. H., Lee, Y. B., Kim, H. C., Yoon, C. W., Nam, S., & Kang, S. O. (2013). Efficient catalytic conversion of ammonia borane to borazine and its use for hexagonal boron nitride (white graphene). Journal of Materials Chemistry A, 1(6), 1976-1981. https://doi.org/10.1039/c2ta00758d