Cavitating inside spherical boron nitride nanoparticles dependent on controllably follow-up treated atmospheres
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RESEARCH PAPER
Cavitating inside spherical boron nitride nanoparticles dependent on controllably follow-up treated atmospheres Chaoze Liu & Kun Fu & Zhixuan Wang & Chaochao Cao & Jingwen Yang & Qinghong Zhai & Bozheng Wang & Zheng Zhou & Jiawei Ji & Mengyuan Li & Zhenya Liu & Yanming Xue & Chengchun Tang
Received: 7 May 2020 / Accepted: 21 September 2020 # Springer Nature B.V. 2020
Abstract A novel two-step method is developed for the facile preparation of hollow nano-spherical boron nitride (BN). BN nanospheres prepared by the traditional chemical vapor deposition reaction of ammonia and trimethyl borate were hollowed out. The average size of solid BN nanospheres precursor was ~ 130 nm. Boron nitride phase, morphology, and surface functionalization characterization along with the measurement of O content, and surface functionality were used to illustrate the final differences among various cavitating BN nanospheres treated with different gas flows at a higher temperature. Several possible formation mechanisms for the BN cavitating structures were proposed. This work provides direction for the controllable preparation of hollow-type BN particles.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11051-020-05026-y) contains supplementary material, which is available to authorized users. C. Liu : K. Fu : Z. Wang : C. Cao : J. Yang : Q. Zhai : B. Wang : Z. Zhou : J. Ji : M. Li : Z. Liu : Y. Xue : C. Tang School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People’s Republic of China C. Liu : K. Fu : Z. Wang : C. Cao : J. Yang : Q. Zhai : B. Wang : Z. Zhou : J. Ji : M. Li : Z. Liu : Y. Xue (*) : C. Tang (*) Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, People’s Republic of China e-mail: [email protected] e-mail: [email protected]
Keywords Hexagonal boron nitride . Solid BN nanosphere . Hollow BN nanosphere . Trimethyl borate
Introduction Hexagonal boron nitride (h-BN) is a kind of advanced ceramic materials, which has become famous for its outstanding high thermal conductivity, chemical inertness, low dielectric constant, and so on (Thangasamy and Sathish 2015; Liu et al. 2018). Particularly, the everaccelerated development of various BN nanostructures including BN nanotubes (BNNTs) (Tang et al. 2006b), nanosheets (BNNSs) (Golberg et al. 2010), nanofibers (BNNFs) (Song et al. 2017), and nanospheres (Firestein et al. 2018) has promoted further practical application of hBN nanomaterials in a wide field. Among them, BN nanospheres have a unique isotropic structure, and they are full of stacking stress and defects (Tian et al. 2013). Generally, the BN nanospheres with hollow properties are more applicable to the hydrogen storage, adsorbents, nanocontainers, and catalyst supports, due to their larger specific surface area (Lian et al. 2012; Si et al. 2016). In recent years, it was found that this kind of BN hollow nanospheres was great potential for drug delivery fo
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