Study in synthesis and characterization of carbon nanotubes decorated by magnetic iron oxide nanoparticles

Magnetic nanoparticles iron oxide with average sizes of 6 nm were synthesized by a chemical coprecipitation method from mixtures of FeCl 2 ·4H 2 O and FeCl 3 ·6H 2 O. For preparation, multi-walled carbon nanotubes (MWCNTS) with outer diameter of 50 nm, wall thickness from 1 to 2 nm and length from 500–2,000 nm were used. Characterization of the MWCNT–Fe 3 O 4 by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM), thermo-gravimetric analysis (TGA) and magnetic characterization was conducted on a vibrating sample magnetometer (VSM).