Shielding effectiveness study of CoZCF-MWCNT nanocomposite materials and its possible application as EM pollution reducer

In this article, Co0.40Zn0.40Cu0.20Fe2O4 (CoZCF) nanoparticles were synthesized using sol-gel method. The Field Emission Scanning Electron Microscopy (FESEM) micrographs delineate the proper encapsulation of the soft magnetic nanoparticles inside the matrix of multi-walled carbon nanotubes (MWCNTs) and ensuring proper fabrication of the CoZCF-MWCNT nanocomposites. The X-ray Diffraction (XRD) analysis and Raman spectroscopy confirms the presence of the multi-phase nature of CoZCF-MWCNT nanocomposites. The static magnetic development of the nanocomposites as a function of temperature and the shielding effectiveness behavior in X-band and K-u-band of microwave radiation have been studied herein. Different static magnetic quantities were extracted. The magnetic observation confirms the presence of ferrimagnetic state with magnetization of 48.4 and 44.8 emu g(-1) respectively at room temperature (RT) in CoZCF-MWCNT nanocomposites. The variation of hysteresis loop area with the lowering of temperature depicts the transformation of CoZCF-MWCNT nanocomposites from superparamagnetic to ferromagnetic state. The shielding effectiveness study was conducted in the X- and K-u- bands of electromagnetic radiation and the observation shows a high value of total shielding effectiveness (SET) of similar to -31.3 dB corresponding to 10.7 GHz. This is due to the high of attenuation of > 99.9% and wide bandwidth. This improved SET of CoZCF-MWCNT nanocomposites gives us completely new insights for the construction of microwave absorber/Radar Absorbing Materials (RAMs) that can contest against harmful electromagnetic pollution.

Automated summary

In this article, Co0.40Zn0.40Cu0.20Fe2O4 (CoZCF) nanoparticles were synthesized using sol-gel method. The Field Emission Scanning Electron Microscopy (FESEM) micrographs show the encapsulation of soft magnetic nanoparticles inside multi-walled carbon nanotubes (MWCNTs) and the fabrication of CoZCF-MWCNT nanocomposites. X-ray Diffraction (XRD) analysis and Raman spectroscopy confirm the multi-phase nature of CoZCF-MWCNT nanocomposites. The article also investigates the static magnetic development of the nanocomposites with temperature and the shielding effectiveness in X- and K-u-bands of microwave radiation.