期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 6, 页码 1976-1981出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ta00758d
关键词
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资金
- Korea Institute of Science and Technology (KIST) Institutional Program
- Converging Research Center Program
- Ministry of Education, Science and Technology [2012K001429]
- New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government Ministry of Knowledge Economy [20113030040020]
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 degrees C for 6 h under a dynamic vacuum that was maintained at 30 torr. Borazine was isolated through a series of -45 degrees C, -78 degrees C, and -196 degrees C traps to give (-78 degrees 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.
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