Jump to main content
Jump to site search


Catalyst-free one step synthesis of large area vertically stacked N-doped graphene-boron nitride heterostructures from biomass source

Author affiliations

Abstract

A procedure for the one-step preparation of films of few-layer N-doped graphene on top of nanometric hexagonal boron nitride sheets ((N)graphene/h-BN) based on the pyrolysis at 900 °C under an inert atmosphere of a film of chitosan containing about 20 wt% of ammonium borate salt as a precursor is reported. During the pyrolysis a spontaneous segregation of (N)graphene and boron nitride layers takes place. The films were characterized by optical microscopy that shows a thin graphene overlayer covering the boron nitride layer, the latter showing characteristic cracks, and by XPS measurements at different monitoring angles from 0° to 50° where an increase in the proportion of C vs. B and N was observed. The resulting (N)graphene/h-BN films were also characterized by Raman, HRTEM, SEM, FIB-SEM and AFM. The thickness of the (N)graphene and h-BN layers can be controlled by varying the concentration of precursors and the spin coating rate and is typically below 5 nm. Electrical conductivity measurements using microelectrodes can cause the burning of the graphene layer at high intensities, while lower intensities show that (N)graphene/h-BN films behave as capacitors in the range of positive voltages.

Graphical abstract: Catalyst-free one step synthesis of large area vertically stacked N-doped graphene-boron nitride heterostructures from biomass source

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Nov 2017, accepted on 26 Jan 2018 and first published on 26 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR08424B
Citation: Nanoscale, 2018, Advance Article
  •   Request permissions

    Catalyst-free one step synthesis of large area vertically stacked N-doped graphene-boron nitride heterostructures from biomass source

    I. Esteve-Adell, J. He, F. Ramiro, P. Atienzar, A. Primo and H. García, Nanoscale, 2018, Advance Article , DOI: 10.1039/C7NR08424B

Search articles by author

Spotlight

Advertisements