Microstructure and magnetism of Ni0.5Zn0.5Fe2O4/MWCNTs nanocomposites

The multitechnique characterization of magnetic nanocomposites NZFO/f-MWCNTs synthesized via co-precipitation method based on Ni0.5Zn0.5Fe2O4 ferrite nanoparticles (NFZO) and functionalized multiwalled carbon nanotubes (f-MWCNTs) is reported. The XRD patterns and TEM images confirm the successful formation of composites after synthesis. The crystallites size of NZFO particles in almost non-dependent on treatment route in contrary to microstructure of as-synthesized hybrids. The comparison of XPS spectra of studied nanomaterials reveals the domination of MWCNT5 contribution as expected. The iron redistribution/separation confirmed by variation within deconvoluted Fe2p spectra is dependent on calcination process. The magnetic properties in composites is slightly affected by catalyst residuals but the occurrence of superparamagnetic (SPM) state originated from NZFO is sustained.