Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Abstract

Iron oxide (α‐Fe2O3) nanocrystals powder was successfully synthesized via the sol‐gel method. The microstructural examination of the synthesized nanocrystals confirmed the formation of α‐Fe2O3 (hematite) structure using X‐ray diffraction and Fourier transform infrared. The synthesized nano‐hematite powder with different weight percentage up to 5 wt% was introduced to polyvinyl chloride (PVC) to fabricate PVC/Fe2O3 nanocomposites using the solution‐cast technique. The dielectric spectroscopic analysis for the investigated samples has been studied at room temperature and at different temperatures up to 120°C. The real part of the permittivity (ε′) exhibited a significant dependence on filler concentrations throughout whole temperature range. However, the dependency of both of the loss tangent (tanδ) and AC conductivity (σac) on filler concentrations is more pronounced at temperatures higher than room temperature. The obtained values of tan δ for the investigated nancomposites referred to the α‐relaxation around 70°C, which is close to glass transition temperature of the investigated PVC. The dependency of the dielectric strength on Fe2O3 nanofiller concentration was observed with enhancement in the dielectric strength reach to 20.5% for PVC/0.7 wt% Fe2O3 nanocomposite higher than the recorded value for the pristine PVC.

Removal of the commercial reactive dye Procion Blue MX-7RX from real textile wastewater using the synthesized Fe2O3 nanoparticles at different particle sizes as a source of Fenton's reagent

“…Reagents of analytical grade were used in the synthesis without additional purication. The used synthetic procedure has been reported elsewhere 37,38 with some modications in the used iron oxide precursor concentration. In the typical procedure, both methanol and diethanolamine [HN(CH 2 CH 2 OH) 2 , DEA] were used as the solvent and chelating agent, respectively.…”

Preparation of an rGO and iron oxide nanoparticle-incorporated polyvinyl acetate based membrane for the removal of Pb2+ from anticorrosive paint industrial wastewater

“…23 Similarly, the presence of hematite (Fe 2 O 3 ) NPs in a polyvinyl chloride matrix can further induce the permittivity of this material. 24 Therefore, it would be worth studying an MMM with Fe 2 O 3 NPs in combination with rGO (as fillers) in a polymer matrix and in turn apply it for the removal of obnoxious Pb 2+ from model as well as real industrial wastewater.…”

Dielectric response of Cr ̵ doped TiO_2 nanoparticles: Effect of doping concentration and annealing temperature

“…The properties of semiconductor nanoparticles (NPs) have greatly dependent on its size, therefore size controlling during synthesization allows for the fabrication of novel materials which used in DRAMS and dielectric resonators (DR) [1,5]. Semiconductor NPs such as TiO 2 , ZnO and Fe 2 O 3 were used as filler into insulating polymer as well as transformer oil to improve their dielectric performance [6][7][8][9]. TiO 2 is one of the most significant semiconductors widely studied recently due to its many features such availability, chemical stability, nontoxicity, opticalelectronic properties, low cost, and high photocatalytic properties [2,10].…”