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Author Nersisyan, Hayk ♦ Lee, Tae-Hyuk ♦ Lee, Kap-Ho ♦ Jeong, Seong-Uk ♦ Kang, Kyung-Soo ♦ Bae, Ki-Kwang ♦ Lee, Jong-Hyeon
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ AMMONIUM CHLORIDES ♦ BORATES ♦ BORON NITRIDES ♦ BORON OXIDES ♦ COMBUSTION ♦ COMBUSTION WAVES ♦ EMISSION SPECTROSCOPY ♦ FIELD EMISSION ♦ MIXTURES ♦ NANOSTRUCTURES ♦ NITROGEN ♦ SCANNING ELECTRON MICROSCOPY ♦ SOLIDS ♦ SPECIFIC SURFACE AREA ♦ SURFACE AREA ♦ SYNTHESIS ♦ X-RAY DIFFRACTION
Abstract We have investigated a thermally induced combustion route for preparing 2D hexagonal BN nanoplates from B{sub 2}O{sub 3}+(3+0.5k)Mg+kNH{sub 4}Cl solid system, for k=1–4 interval. Temperature–time profiles recorded by thermocouples indicated the existence of two sequential exothermic processes in the combustion wave leading to the BN nanoplates formation. The resulting BN nanoplates were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy, PL spectrometry, and Brunauer–Emmett–Teller surface area analysis. It was found that B{sub 2}O{sub 3} was converted into BN completely (by XRD) at 1450–1930 °C within tens of seconds in a single-step synthesis process. The BN prepared at a k=1–4 interval comprised well-shaped nanoplates with an average edge length ranging from 50 nm to several micrometer and thickness from 5 to 100 nm. The specific surface area of BN nanoplates was 13.7 g/m{sup 2} for k=2 and 28.4 m{sup 2}/g for k=4. - Graphical abstract: 2D hexagonal BN nanoplates with an average edge length ranging from 50 nm to several micrometer and thickness from 5 to 100 nm were prepared by combustion of B{sub 2}O{sub 3}+(3+0.5k)Mg+kNH{sub 4}Cl solid mixture in nitrogen atmosphere. - Highlights: • Thermally induced combustion route was developed for synthesizing BN nanoplates from B{sub 2}O{sub 3}. • Mg was used as reductive agent and NH{sub 4}Cl as an effective nitrogen source. • Temperature–time profiles and the combustion parameters were recorded and discussed. • BN with an average edge length from 50 nm to several micrometer and thickness from 5 to 100 nm were prepared. • Our study clarifies the formation mechanism of BN in the combustion wave.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-05-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 225


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