Exfoliation of MoS2 and h-BN nanosheets by hydrolysis of LiBH4
Exfoliation of MoS2 and h-BN nanosheets by hydrolysis of LiBH4
复制标题
通过 LiBH4 水解剥离 MoS2 和 h-BN 纳米片
DOI：
10.1088/1361-6528/aa5964
复制
发表时间：
2017
期刊：
影响因子：
3.5
通讯作者：
Zhu M
中科院分区：
文献类型：
--
作者：
Zhu Jiuyi;Wang Hui;Ouyang Liuzhang;Zhu M
高效制备二维材料仍然是一个巨大的挑战。这些材料具有独特的电学、光学和热学性能。在本研究中，利用LiBH4的水解反应，制备了少层MoS2纳米片和纳米片。首先，将层状二硫化钼粉末材料与LiBH4混合，得到均匀的粉末混合物，然后在300℃、4 MPa H2条件下将混合物加热至LiBH4熔点以上2 h，在此过程中，层状材料被液态LiBH4卷曲。在随后的LiBH4水解过程中，层状材料通过氢气生成被分解成纳米片。所制得的MoS2纳米片厚度均匀，厚度为~4 nm，宽度为2 ~ 10 μm，产率大于1.5 wt.%。通过制备少层h-BN，验证了该方法的有效性。这项工作为生产二维材料提供了一条新的高产率途径。
Efficient preparation of two-dimensional materials is still a great challenge. These materials possess unique electrical, optical, and thermal properties. In this study, few-layer MoS2 nanosheets and nanoflakes were exfoliated by the hydrolysis reaction of LiBH4. First, the layered MoS2 powder materials were mixed with LiBH4 to obtain a homogeneous powder mixture, and then the mixture was heated above the melting point of LiBH4 under 300 °C and 4 MPa H2 for 2 h, during which the layered materials were curled by liquid LiBH4. In the subsequent hydrolysis of LiBH4, the layered materials were split into nanosheets by H2 gas generation. The obtained MoS2 nanosheets show almost uniform thickness of ~4 nm, with a width of 2–10 μm and a yield of more than 1.5 wt.%. The effectiveness of this method has also been verified by the preparation of few-layer h-BN. This work provides a new high-yield route to producing two-dimensional materials.