Detailed investigation of the structural and electrical properties of ZnO/Fe₃O₄ nanocomposites

Abstract

The nanocomposites with the formula (1-x)ZnO+xFe3O4 (x=0, 0.01, 0.03, 0.05, 0.7 and 0.09) were prepared using the sonomechanical method, while the pristine ZnO and Fe3O4 were prepared using the co-precipitation technique. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and a high-resolution broadband impedance analyzer were used to examine the structural, microstructure, and dielectric properties of the investigated samples. XRD analysis assures that the wurtzite hexagonal structure of ZnO for all nanocomposite samples. The FTIR showed the existence of a functional group of ZnO and Fe3O4. The ac conductivity, dielectric constant (ε'), dielectric loss (ε''), electric Modulus, impedance, and Nyquist plot were studied as a function of frequency and at different temperatures. The results show that the small concentration of Fe3O4 affects the ac conductivity and dielectric properties. The Koops phenomenological theory and the Maxwell-Wagner interfacial model were used to analyze the observed dielectric dispersion. The analysis of modulus and impedance results indicated the existence of non-Debye relaxation and the involvement of both grains and grain borders in polarization. The impedance study reveals that just one semicircle is observed in all samples, indicating that the influence of grain boundaries is more significant than the contribution of grains.

Fe3O4-ZnO:V Nanocomposites with Modulable Properties as Magnetic Recoverable Photocatalysts

“…This enhancement is related to their electronic structure and strong emission in the visible light [21,27]. In our specific samples, the spectral response can be shifted towards the visible region by doping with vanadium ions, an intriguing element known for its unique electronic configuration which is an essential attribute in real-world applications [17,28,29]. It is essential to recognize the benefits of UV irradiation in photocatalysis, including its ability to eliminate microbes and its potential application in areas limiting access to sunlight [30,31].…”

Integrated study of the structural and magnetic characteristics of Nd(Mn, Cr)0.5O3: exploring perovskite material

“…Perovskites are a type of inorganic crystal that has gained significant attention due to their physical properties and various applications in fields such as semiconducting, optoelectronics, and sensing [1][2][3]. They have found widespread use in industrial applications, such as the multilayer ceramic capacitor industry, where perovskite nanopowder is utilized for its excellent dielectric properties [4].…”