Microwave-assisted cross-coupling synthesis of aryl functionalized MWCNTs and investigation of hydrogen storage properties
Abstract
In recent years, nanostructures have attracted the attention of many scientists due to their unique
properties. Many properties of nanostructures can be improved by changing the surface. For this
purpose, multi-walled carbon nanotubes (MWCNTs) were covalently modified using Suzuki-cross
coupling reactions with microwave-assisted synthesis. First, the MWCNTs were brominated. Aryl
functionalized MWCNTs were synthesized from the reaction of brominated MWCNTs with aryl boronic acid derivatives in the presence of palladium catalyst. Synthesized compounds were characterized by the techniques of Fourier-Transform Infrared Spectroscopy, Nuclear Magnetic
Resonance, Thermogravimetric Analysis and Transmission Electron Microscopy. The hydrogen storage properties of the synthetic compounds were determined. The example with the highest
hydrogen storage capacity was N2 and its hydrogen storage capacity was determined as
0.45 wt%. The hydrogen storage capacity of functionalized MWCNTs was consistent with the
results of carbon nanomaterials in the literature.