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Issue 41, 2018
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2D boron nitride nanosheets (BNNS) prepared by high-pressure homogenisation: structure and morphology

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Abstract

2D Boron Nitride Nano-sheets (BNNS) were prepared using a high-pressure homogenisation process to exfoliate bulk hexagonal boron nitride (h-BN). The effectiveness of this process was studied by characterising bulk h-BN and BNNS post-processing using numerous techniques. The BNNS produced was composed of a mixture of sheets having lengths on the nanometre (nm) scale, but lateral thicknesses on the micron (μm) length scale. The product was a macro-porous material containing slit-like pores with a surface area of 170 m2 g−1. It had a polycrystalline structure with d002 = 0.335 nm and L002 = 2 nm. From the sharp E2g peak in the Raman spectrum at 1360 cm−1 (FWHM = 12.5 cm−1), the sheets had a low defect density and were highly exfoliated. X-Ray photoelectron spectroscopy (XPS) studies detected B–OH and N–H groups on the BNNS surface and the presence of residual surfactant. Contact angle measurements (60° ± 3° (0 s); 40° ± 2° (10 s)) confirmed a hydrophilic surface. The BNNS was thermally stable under oxidative conditions up to 323 °C.

Graphical abstract: 2D boron nitride nanosheets (BNNS) prepared by high-pressure homogenisation: structure and morphology

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Article information


Submitted
09 Aug 2018
Accepted
07 Oct 2018
First published
08 Oct 2018

Nanoscale, 2018,10, 19469-19477
Article type
Paper

2D boron nitride nanosheets (BNNS) prepared by high-pressure homogenisation: structure and morphology

V. Guerra, C. Wan, V. Degirmenci, J. Sloan, D. Presvytis and T. McNally, Nanoscale, 2018, 10, 19469
DOI: 10.1039/C8NR06429F

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