Stable colloidal boron nitride nanosheet dispersion and its potential application in catalysis
Stable colloidal boron nitride nanosheet dispersion and its potential application in catalysis
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稳定的胶体氮化硼纳米片分散体及其在催化中的潜在应用
DOI：
10.1039/c3ta12231j
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Qiu, Xiaoqing
中科院分区：
文献类型：
--
作者：
Huang, Caijin;Chen, Cheng;Qiu, Xiaoqing
六方氮化硼纳米片是一种很有前途的层状材料，近年来受到越来越多的关注。本研究基于h-BN的表面能与溶剂表面张力的匹配，开发了一种在乙二醇中制备稳定的高浓度胶体h-BN纳米片分散体的简单方法。研究发现，在超声的辅助下，大块h-BN可以在乙二醇溶剂中直接剥离和分散，形成稳定的单层h-BN纳米片。此外，稳定的胶体h-BN纳米片已被证明是支持和分散贵金属纳米颗粒（如Ag， Au和Pt）的良好载体，具有高的还原对硝基苯酚的催化活性。我们的研究结果表明，稳定的高浓度h-BN胶体分散体可以为h-BN基材料的一系列重要应用开辟道路。
Hexagonal boron nitride (h-BN) nanosheets, a promising layered material, have drawn more and more attention in recent years. In this study, a simple method has been developed to prepare stable colloidal h-BN nanosheet dispersion with high concentration in ethylene glycol based on the matching of the surface energies of h-BN and the surface tension of the solvent. It is found that bulk h-BN can be directly exfoliated and dispersed in ethylene glycol solvent with the assistance of sonication to form stable h-BN nanosheets with a few layers. Furthermore, the stable colloidal h-BN nanosheets have been demonstrated to be good carriers to support and disperse noble metal nanoparticles such as Ag, Au, and Pt with high catalytic activity for the reduction of p-nitrophenol. Our results suggest that stable colloidal h-BN dispersion with high concentration in ethylene glycol could open the way to a range of important applications of h-BN based materials.