Journal
CARBON
Volume 215, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2023.118472
Keywords
Boron carbon nitride nanosheets (BCNNS); Graphene nanoflakes (GNF); Boron nitride nanosheets (BNNS); Band gap; Semiconductors; Inductively coupled plasma
Ask authors/readers for more resources
Band gap-controlled two-dimensional boron carbon nitride nanosheets were synthesized using a thermal plasma-based process, with the ability to control the band gap achieved by manipulating the carbon content. The nanosheets exhibited non-uniform layer stacking and dislocation-type defects, with a quasi-uniform distribution of B/N/C. The optical band gap increased as the carbon content decreased.
Band gap-controlled two-dimensional boron carbon nitride nanosheets (BCNNS) were synthesized via a scalable one-step thermal plasma-based process near atmospheric pressure. Monotonic change in the band gap of BCNNS from 2.4 to 4.1 eV was achieved through manipulating the carbon loading during the nanosheet formation from ammonia borane and methane. Electron microscopy images showed 2D structures with sizes of 100-200 nm and 1.1-3.7 nm in sheet thickness (3-10 atomic layers). The sheets displayed non-uniformity in layer stacking and dislocation-type defects indicating the inclusion of BN in the C framework. Quasi-uniform distribution of the B/ N/C was shown through energy dispersive X-ray spectroscopy. The presence of these elements as well as the sp2 hybridization of the bonding were confirmed using electron energy loss spectroscopy. Fourier Transform infrared spectroscopy showed the presence of B-N/B--N, C-N/C--N, and C-B/C--B groups, and Raman spectroscopy showed progressive graphitization across the BCNNS samples as the BN content is decreased. The optical band gap of various samples is estimated using the Tauc method and found to increase as the carbon content decreased.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available