Herein, we presented electromagnetic interference shielding characteristics of NiFe₂O₄ nanoparticles—in-situ thermally-reduced graphene oxide (RGO)—polypropylene nanocomposites with the variation of reduced graphene oxide content. The structural, morphological, magnetic, and electromagnetic parameters and mechanical characteristics of fabricated nanocomposites were investigated and studied in detail. The controllable composition of NiFe₂O₄-RGO-Polypropylene nanocomposites exhibited electromagnetic interference (EMI) shielding effectiveness (SE) with a value of 29.4 dB at a thickness of 2 mm. The enhanced EMI shielding properties of nanocomposites with the increase of RGO content could be assigned to enhanced attenuation ability, high conductivity, dipole and interfacial polarization, eddy current loss, and natural resonance. The fabricated lightweight NiFe₂O₄-RGO-Polypropylene nanocomposites have potential as a high performance electromagnetic interference shielding nanocomposite.

This article provides a review of heterojunction-based (type-II and Z-scheme) photocatalytic nitrogen fixation, including fundamental principles, current progress, and prospects.

In this paper, we report the preparation of visible-light active direct Z-scheme Cu₂O/WO₃ nanocomposite photocatalyst by a solid-state reaction avoiding the otherwise inevitable formation of CuWO₄ phase in wet syntheses. Structure, morphology, and thermal and optical properties of prepared WO₃ nanoplatelets decorated by Cu₂O were investigated by XRD, Raman spectroscopy, SEM/TEM, combined thermogravimetric (TG)/differential scanning calorimetry (DSC) analysis, and UV–VIS spectroscopy. The photocatalytic performance of the prepared samples under UV and visible light was studied through monitoring discoloration of methylene blue under illumination by selected wavelengths, allowing for the distinguishing between the contributions of the two semiconductive components. Experimental results showed that the decoration of WO₃ nanoplates by Cu₂O nanoparticles led to an improvement in photocatalytic performance, regardless of used LED (Light-Emitting Diode) wavelength, even at low concentrations. By using scavengers selectively blocking reactive species involved in the discoloration reaction, we determined that the Cu₂O/WO₃ nanocomposite exhibited the characteristics of direct Z-scheme-type photocatalyst.