International Institute for Nanocomposite Manufacturing (IINM), WMG, University of Warwick, CV4 7AL, UK.
Nanoscale. 2018 Nov 7;10(41):19469-19477. doi: 10.1039/c8nr06429f. Epub 2018 Oct 15.
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 g. It had a polycrystalline structure with d = 0.335 nm and L = 2 nm. From the sharp E peak in the Raman spectrum at 1360 cm (FWHM = 12.5 cm), 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.
2D 氮化硼纳米片（BNNS）是通过高压均质化工艺从块状六方氮化硼（h-BN）中剥离出来的。通过对块状 h-BN 和 BNNS 后处理进行多种技术的表征，研究了该工艺的有效性。所制备的 BNNS 由长度在纳米（nm）尺度上的薄片混合物组成，但横向厚度在微米（μm）尺度上。该产物是一种具有纳米级厚度的宏观多孔材料，包含具有 170 m²/g 比表面积的狭缝状孔。它具有多晶结构，d = 0.335nm，L = 2nm。从拉曼光谱中在 1360cm 处的尖锐 E 峰（FWHM = 12.5cm）可以看出，薄片的缺陷密度低，剥离程度高。X 射线光电子能谱（XPS）研究检测到 BNNS 表面存在 B-OH 和 N-H 基团以及残留的表面活性剂。接触角测量（60°±3°（0s）；40°±2°（10s））证实了其亲水表面。BNNS 在氧化条件下的热稳定性高达 323°C。
