boron nitride nanosheet (BNNS), high crystallinity, sonication-assisted, hydrothermal method
A simple method to prepare two-dimensional hexagonal boron nitride (h-BN) scalably is essential for practical applications. Despite intense research in this area, high-yield production of two-dimensional h-BN with large size and high crystallinity is still a key challenge. In the present work, we propose a simple exfoliation process for boron nitride nanosheets (BNNSs) with high crystallinity by sonication-assisted hydrothermal method, via the synergistic effect of the high pressure, and cavitation of the sonication. Compared with the method only by sonication, the sonication-assisted hydrothermal method can get the fewer-layer BNNSs with high crystallinity. Meanwhile, it can reach higher yield of nearly 1.68%, as the hydrothermal method with the yield of only 0.12%. The simple sonication-assisted hydrothermal method has potential applications in exfoliating other layered materials, thus opening new ways to produce other layered materials in high yield and high crystallinity.
Tsinghua University Press
Zhaobo TIAN, Kexin CHEN, Siyuan SUN et al. Crystalline boron nitride nanosheets by sonication-assisted hydrothermal exfoliation. Journal of Advanced Ceramics 2019, 8(1): 72-78.