Highly Efficient Mass Production of Boron Nitride Nanosheets via a Borate Nitridation Method,The Journal of Physical Chemistry C

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Highly Efficient Mass Production of Boron Nitride Nanosheets via a Borate Nitridation Method
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-07-19 , DOI: 10.1021/acs.jpcc.8b05702
Taotao Li _{1,

2} , Chaowei Li _{3,

4} , Yongqing Cai ₅ , Junhao Lin ₆ , Xiaoyang Long ₃ , Liangjie Wang ₃ , Yancui Xu ₃ , Juan Sun ₃ , Lei Tang ₃ , Yong-Wei Zhang ₅ , Kazu Suenaga ₆ , Zheng Liu ₂ , Yagang Yao _{1,

3,

4}

Affiliation

Boron nitride nanosheets (BNNSs) have attracted intensive attention because of their fantastic properties, including excellent electrical insulating ability, splendid thermal conductivity, and outstanding oxidation resistance. However, facing the rising demand for versatile applications, the cost-effective mass production of BNNSs, similar to graphene, remains a huge challenge. Here, we provide a highly effective strategy for BNNS synthesis via a borate nitridation method utilizing solid borate precursors, producing gram-scale yields with efficiencies up to 88%. Combined with density functional theory (DFT) calculations, a vapor–solid–solid (VSS) mechanism was proposed in which ammonia vapor reacts with the solid borates, producing solid BNNSs at the vapor–solid interfaces. The strategy proposed herein, together with the diversity of borate compounds, allows numerous choices for the facile mass production of BNNSs at low cost. In addition, the remarkably enhanced thermal conductivity in composite materials demonstrated good quality and huge potential for these BNNSs in thermal management. This work reveals a cost-efficient method for the large-scale production of BNNSs, which should promote practical applications in various fields.

中文翻译：

通过硼酸盐氮化方法高效批量生产氮化硼纳米片

氮化硼纳米片（BNNSs）由于其出色的性能（包括出色的电绝缘能力，出色的导热性和出色的抗氧化性）而受到了广泛的关注。然而，面对对通用应用的不断增长的需求，与石墨烯类似的BNNS的经济有效的批量生产仍然是一个巨大的挑战。在这里，我们通过使用固体硼酸盐前体的硼酸盐氮化方法提供了一种高效的BNNS合成策略，可产生克级收率，效率高达88％。结合密度泛函理论（DFT）计算，提出了一种汽-固-固（VSS）机理，其中氨气与固体硼酸盐反应，在气-固界面处产生固体BNNS。本文提出的策略，再加上硼酸盐化合物的多样性，为以低成本方便地批量生产BNNS提供了众多选择。此外，复合材料的导热系数显着提高，证明了这些BNNS在热管理方面的优良品质和巨大潜力。这项工作揭示了一种大规模生产BNNS的具有成本效益的方法，这将促进在各个领域的实际应用。

更新日期：2018-07-20

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