Multi-walled carbon nanotubes synthesis on iron ore pellets by CVD method

Abstract

The aim of this work was to determine the efficiency of iron ore pellets using as catalyst for carbon nanotubes (CNTs) growing by chemical vapor deposition (CVD). The products of methane air conversion were used as a working atmosphere and source of carbon. Our previous experimental studies and thermodynamic calculations made it possible to choose the optimal temperature of the process. The choice of a catalyst was dictated by the idea of using ready-made materials that do not require preliminary preparation. The performed studies have shown both the high efficiency of CNTs growth on iron catalysts and the high and uniform quality of the resulting product. Raman spectra confirmed the presence of CNTs with two characteristic peaks at 1310 and 1578 cm⁻¹ corresponding to D and G modes, respectively. Obtained CNTs by CVD method are multi-walled and most likely have a curved structure.