2D boron nitride nanosheets (BNNS) prepared by high-pressure homogenisation: structure and morphology. Issue 41 (15th October 2018)

• Record Type: Journal Article
• Authors: Guerra, Valentina; Wan, Chaoying; Degirmenci, Volkan; Sloan, Jeremy; Presvytis, Dimitris; McNally, Tony
• Is Part Of: Nanoscale. Volume 10:Issue 41(2018)
• Page Start: 19469
• Page End: 19477
• Publication Date: 2018-10-15
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr06429f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Polycrystalline boron nitride nano-sheets (BNNS) were prepared via a scalable high-pressure homogenization process. 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 m 2 g −1 . It had a polycrystalline structure with d 002 = 0.335 nm and L 002 = 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.