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Insight into the liquid-phase exfoliation to prepare BN nanosheets
Materials Letters ( IF 3 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.matlet.2020.127644
Shufen Wang , Bohan Tao , Songyue Yu , Chunxiang Wei , Tao Zhou , Xuan Chen , Chenliang Han , Chao Wang

Abstract Boron nitride nanosheets (BNNSs) were prepared by metal-hydroxyl ion assisted liquid exfoliation from commercial hexagonal boron nitride (h-BN) powder. Aqueous solution of LiOH, NaOH and KOH were selected to examine the relationship between the nature of ions and the exfoliation efficiency. It was found that the yield of BNNSs were improved with the decrease of the size of cations and can be up to 12.75% in the LiOH aqueous solution. Cations with smaller radius were more easily absorbed on the outmost surface of bulk h-BN; and further inserted into the interlayer space, which is a key step for efficient preparation of BNNSs in alkaline aqueous solution. Furthermore, the morphology and structure of the as-prepared BNNSs were determined by multiple characterizations. It was also revealed that the finally obtained BNNSs are high-quality few-layer and not functionalized during exfoliation.

中文翻译:

深入了解液相剥离以制备 BN 纳米片

摘要 氮化硼纳米片(BNNSs)是通过金属-羟基离子辅助液体剥离从商业六方氮化硼(h-BN)粉末中制备的。选择 LiOH、NaOH 和 KOH 的水溶液来检查离子性质与剥离效率之间的关系。发现BNNSs的产率随着阳离子尺寸的减小而提高,在LiOH水溶液中可达12.75%。半径较小的阳离子更容易被大块 h-BN 的最外表面吸收;并进一步插入层间空间,这是在碱性水溶液中有效制备 BNNSs 的关键步骤。此外,所制备的 BNNS 的形态和结构是通过多种表征确定的。
更新日期:2020-06-01
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