synthesis and characterization of carbon nanotubes decorated with magnesium ferrite (mgfe2o4) nanoparticles by citrate-gel method

in the present work, magnetic nanocomposites of the multi-walled carbon nanotubes (mwcnts) decorated with magnesium ferrite (mgfe2o4) nanoparticles were synthesized successfully by citrate-gel method. the shape, structure, size, and properties of the as-synthesized sample were characterized by fourier transform infrared spectroscopy (ftir), x-ray diffraction pattern (xrd), transmission electron microscope (tem), vibrating sample magnetometry (vsm), and ac susceptibility measurements. the results showed that mwcnts and mgfe2o4 coexisted in the nanocomposite and a large number of the high purity magnesium ferrite mgfe2o4 nanoparticles were attached on the surface of the mwcnts. the hysteresis loop of the mgfe2o4/mwcnts nanocomposites showed that the nanocomposites were superparamagnetic with the saturated magnetization of 11.79 emu/g, and the coercive of 49 oe.