LAUSR

Abstract In this report the emphasis has been given on the influence of carbon nitride (C3N4) semiconducting fillers for the enhancement of the electromagnetic interference shielding effectiveness. This is the first ever report where the inexpensive composite nanomaterials of Ni-Zn-Cu-Ferrite-C3N4-Poly(vinylidene fluoride) are fabricated by very simple solution casting method. Structural and chemical studies have confirmed the presence of all the required phase of the component materials in the heterostructure composite films. The magnetic NZCF nanoparticles are responsible for the generation of the high magnetic loss in terms of domain wall resonance. Also, C3N4 semiconducting fillers all around the NZCF nanoparticles and the interactions between these binary nanofillers and the β-phase reach PVDF matrix are responsible for the generation of polarization loss, conduction loss and eddy current loss by their interactions with the electromagnetic (EM) wave of GHz frequency range. The presence of these binary nanofillers (Ni-Zn-Cu-Ferrite-C3N4) inside the matrix of PVDF are responsible for the improvement of the shielding effectiveness due to absorption and shielding effectiveness due to reflection. High value of total shielding effectiveness of -71.5 dB and -88 dB has been observed corresponding to the X-band and Ku-band for these NZCF-C3N4-PVDF composite films. Such high value of attenuation of >99.999999% and the corresponding wide bandwidth of NZCF-C3N4-PVDF composite films offers a completely new insights for the fabrication of microwave absorber to combat against electromagnetic pollution.