Structural property of boron-doped double-walled carbon nanotubes

Abstract

The doping of CNTs with boron appears promising in view of the changes brought about in the electronic structures by these dopants. The substitution of boron atom in carbon network gives rise to p-type doping. In this communication, we demonstrate the synthesis of high-quality boron doped DWCNTs by catalytic decomposition of tetra hydro furan (THF) and triisopropyl borate over Fe-Mo/MgO catalyst at 900°C. In order to achieve in-situ boron doping and growth for DWCNTs, we controlled concentration of boron precursors by passing the Ar gas through the bubbler, which contained liquid triisopropyl borate/methanol. We also evaluate structural properties and doping effect of DWCNTs from the TEM and Raman results.