High-Yield Synthesis of Cubic and Hexagonal Boron Nitride Nanoparticles by Laser Chemical Vapor Decomposition of Borazine

Abstract

We report a new method for the synthesis of boron nitride nanostructures (nBN) using laser chemical vapor decomposition (LCVD). Borazine was used as precursor and excited with two simultaneous radiations, the fundamental and second YAG laser harmonics. If only one of the two radiations is employed, no reaction takes place. Abundant BN powder is obtained aer one hour of laser radiation. e BN yield obtained with the LCVD technique is about 83% by weight. e BN material was characterized using scanning electron microscopy, transmission electron microscopy, electron energy loss spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. ey all indicate that the BN powder consists of a mixture of hexagonal and cubic BN nanostructures. No other BN phases or stoichiometries were found. e size of the resulting BN nanostructures is in the range of 20-100 nm and their B : N composition is 1 : 1. A simpli�ed mechanism involving laser-excited states followed by photoinduced removal of hydrogen is proposed to understand the synthesis of BN nanopowder by LCVD of borazine.

A Review on the Preparation of Borazine-Derived Boron Nitride Nanoparticles and Nanopolyhedrons by Spray-Pyrolysis and Annealing Process

“…BZ offers the advantage of being a colorless liquid with an adequate vapor pressure. As a consequence, it can be used in a second strategy in various vapor-phase processes [48,[59][60][61][62][63][64][65]. In the present section, the preparation of BZ-derived BN NPs by spray-pyrolysis is reported from the synthesis and characterization of BZ to the characterization and high-temperature thermal behavior of BN NPs.…”

“…Borazine (BZ, H 3 B 3 N 3 H 3 ) appears to be an appropriate precursor of BN NPs. Borazine-derived BN NPs have been reported by Hidalgo et al [48]. In particular, they described the formation of BN NPs (mixed with cubic BN NPs) using laser CVD.…”

Bias-Enhanced Formation of Metastable and Multiphase Boron Nitride Coating in Microwave Plasma Chemical Vapor Deposition

“…In contrast, chemical vapor deposition (CVD) has proven to be a scalable technology for synthesizing a wide range of coating materials including BN coatings with large area uniformity and at the same time it is also very cost effective [ 17 , 18 , 19 , 20 , 24 , 25 ]. Laser chemical vapor deposition was also used to high yield synthesis of cubic and hexagonal boron nitride [ 26 ]. At ordinary temperatures and pressures h -BN is the stable structure of BN and c -BN at high temperatures and pressures.…”

Lattice dynamics in the conformational environment of multilayered hexagonal boron nitride (h-BN) conveys to peculiar infrared optical responses

“…The uncertainty is increased by the wide variability reported in results, e.g. in infrared optical response [25][26][27][28][29][30][31], Raman optical activity [25,[32][33][34], photoluminescence spectroscopy [35][36][37], due to probable highly poly-crystalline nature of probed specimens. Although many possible stacking combinations, only two [25] or three [38] of them have been considered in different theoretical studies related to the interpretation of experimental results.…”