Photoelectric and Magnetic Properties of Boron Nitride Nanosheets with Turbostratic Structure and Oxygen Doping

Turbostratic and oxygen doping (3.7 atom % ) hexagonal boron nitride nanosheets (TO-BNNSs) with abundant defect sites, were synthesized by pyrolyzing the mixture of melamine cyanurate and boric acid. Systematic analyses reveal a highly disordered structures and covalent oxygen-doping in the TO-BNNSs. These features endow the product with increased unpaired electrons, localized charge asymmetry and spin polarization. While compared with bulk h-BN, the optical bandgap of TO-BNNSs drop down to ~5.2 from ~5.7 eV, dielectric constant raised from ~2.1 to ~2.4, the saturation magnetic moment increased from ~0.011 to ~0.033 emu/g, and the coercivity enlarged from ~73.56 to ~367.39 Oe. These results suggest that h-BN materials with turbostratic structure and heteroatom-doping have extensive application prospect in the fields of nanoscale optics, electronics and magnetics.

Tissue-Derived Carbon Microbelt Paper: A High-Initial-Coulombic-Efficiency and Low-Discharge-Platform K+-Storage Anode for 4.5 V Hybrid Capacitors

Hard carbon (HC) is a promising anode material for K+-storage due to its randomly oriented turbostratic structure. However, most reported HC anodes exhibit low initial Coulombic efficiency (ICE) and no...

TiCx–Ti2C nanocrystals and epitaxial graphene-based lamellae by pulsed laser ablation of bulk TiC in vacuum

Faceted δ-TiCx and δ′′-Ti2C nanocondensates co-existing with ribbon-like graphene-based lamellae with a 2-D turbostratic structure.

T-BN Powders Prepared by Chemical Vapor Deposition Using BCl3, NH3 and Ar

T-BN powders were successfully prepared by chemical vapor deposition method using BCl3, NH3 and Ar. The as received BN was less crystallized with turbostratic structure. The morphology of the powders was standard circular which is due to the homogeneous nucleation. The chemical composition of the BN powders was B and N, with B-N bonding.Keywords: Boron Nitride; Chemical vapor deposition; Structure