Abstract
The current approaches used to fabricate hexagonal boron nitrides (h鈥怋N) from boron trioxide and urea always results in contamination of the h鈥怋N product with carbon/oxygen. Thus, discovering a facile way of mass producing high鈥恜urity h鈥怋N remains a challenge. A simple yet highly efficient thermal treatment approach to large鈥恠cale fabrication of nanoporous h鈥怋N with high yield, high purity, and high crystallinity is described using NaNH2 and NaBH4 as the oxygen鈥� and carbon鈥恌ree precursors. The unique properties of inorganic metal salts, i.e., high melting point and strong electrostatic interaction with carbon substrates, render this strategy suitable for the production of homogeneous h鈥怋N/mesoporous carbon and h鈥怋N/carbon nanotube heterostructures of high crystallinity, high h鈥怋N dispersity, and with a strong interfacial effect. These unique features make them promising candidates for supercapacitor applications, resulting a significantly enhanced specific capacitance. This study provides new insight into the fabrication of high鈥恜urity h鈥怋N and h鈥怋N鈥恇ased heterostructures thus expanding their application in the field of energy storage and transformation.
