Crystalline boron nitride nanosheets by sonication-assisted hydrothermal exfoliation

Abstract

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.

From 2-D to 0-D Boron Nitride Materials, The Next Challenge

“…Regarding the case of BN, hydro/solvothermal methods are suitable for the preparation of dots, small clusters, and flakes [47,48,49]. Besides, it is not unusual to carry out a combination of top-down and liquid phase synthesis with the purpose of enhancing the reduction of bulk BN in sheets and functionalizing them [50,51,52].…”

Prediction of allotropes of tellurium with molecular, one- and two-dimensional covalent nets for photofunctional applications

“…2 Since then, 2D materials have attracted extensive interdisciplinary attention and many 2D materials were successfully fabricated, for example, hexagonal boron nitride, graphitic carbon nitride (g-C 3 N 4 ), elemental 2D nanosheets (2D-Xenes), transition metal dichalcogenides (TMD), transition metal carbides and borides (MXenes, MBenes). [3][4][5][6][7][8][9] Besides, the development of computing algorithms and facilities are signicantly accelerating the pace of the discovery of 2D materials. [10][11][12] In 2018, high-throughput calculations identied thousands of easily or potentially exfoliable three-dimensional (3D) layered compounds and more than 30 different prototypes in 2D crystal structures.…”

Investigation on Microstructure, Wave Absorbing Properties and High Temperature Stability for (Mg0.2Ni0.2Co0.2Cu0.2Zn0.2)O High-entropy Ceramics

“…The grain size of S2 is larger than that of S3, which is related to the different preparation technologies of precursors. In general, compared with the co-precipitation method (S2), it is easier to obtain nanodispersed powders through hydrothermal method (S3) [23] . Meanwhile, the grain sizes of sintered samples are also directly affected.…”