Green and efficient production of boron nitride nanosheets via oxygen doping-facilitated liquid exfoliation
| Autor: | Xiaobai Wang, Debbie Hwee Leng Seng, Doreen Mei Ying Lai, Siew Lang Teo, Poh Chong Lim, Junhua Kong, Jing Song, Yosephine Andriani, Xiaowu Zhang, Songlin Liu |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Graphene Process Chemistry and Technology Delamination 02 engineering and technology Thermal treatment 021001 nanoscience & nanotechnology 01 natural sciences Exfoliation joint Environmentally friendly Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Thermal conductivity Chemical engineering chemistry law Boron nitride 0103 physical sciences Materials Chemistry Ceramics and Composites Chemical stability 0210 nano-technology |
| Zdroj: | Ceramics International. 45:4909-4917 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.11.190 |
| Popis: | As the structural analogue of graphene, boron nitride nanosheets (BNNSs) are anticipated to have a wide range of potential applications. BNNSs exhibit good mechanical properties, outstanding thermal conductivity, oxidation and chemical stability and are excellent electrical insulators. While BNNSs have gained recognition as one of the most versatile 2D materials in recent years, their application in research and industry is still hampered by the lack of methods to produce BNNSs in large quantity and a cost-effective way. In this study, we report highly efficient h-BN exfoliation via the oxygen doping-facilitated liquid exfoliation. Oxygen atoms are introduced into the hexagonal boron nitride (h-BN) structure via a facile thermal treatment. The relationship of thermal treatment, structural changes and h-BN exfoliation are studied to elucidate the key factor for advancing the BNNS production. The optimum concentration of hydroxyl groups and weakening of interlayer interactions have synergistically facilitated the delamination of h-BN in water under mild exfoliation conditions, resulting in up to 1255% yield increment and without noticeable new defects in the BNNS structure as compared with the untreated control. An efficient and environmentally friendly exfoliation process of h-BN is a crucial starting point towards the cost-effective and mass production of BNNSs which is needed for the currently identified and myriad future applications of BNNSs. |
| Databáze: | OpenAIRE |
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