Cationic distributions and dielectric properties of magnesium ferrites fabricated by sol-gel route and photocatalytic activity evaluation

Abstract

Sol-gel auto combustion method was adopted to fabricate magnesium ferrite (MgFe2O4) nanoparticles. The structural and morphological properties was studied by XRD, FTIR, and SEM analysis. The average particle sizes of MgFe2O4 was in the range of 35–55 nm. The octahedral & Tetrahedral bond lengths, R AE (tetrahedral edge length), R BE (shared octahedral edge length) and R BEU (individual octahedral edge length), cationic radii (tetra and octa-sites) were also determined. The magnetic strength also showed direct reliance on bond angle and indirect to bond length. Hoping length L a and L b and bond angles are also measured. The frequency dependent conductivity and dielectric properties of MgFe2O4 were investigated by Impedance analyzer. The photocatalytic activity (PCA) is appraised against MB (methylene blue) dye and MgFe2O4 calcined at 800 °C showed promising degradation (78%) under visible light irradiation. The findings revealed that MgFe2O4 is can harvest the solar light, which could be employed for the remediation of wastewater contains textile dyes.

Synthesis of Oval-Shaped Bi2Al4O9 Nanoparticles and Their Applications for the Degradation of Acid Green 25 and as Fuel Additives

“…In the world, the annual production of various synthetic dyes is greater than 7 × 10 5 tons. Dyes consumed by textile industry alone are almost 10 000 tons per year globally and about 100 tons of dyes get discharged into water channels each year which negatively affect the living beings. − Acid Green 25 (AG, Figure ) is actually 1, 4-diaminoanthraquinone dye having two sulfonic acid groups at terminals. It is used in staining silk, wool, and synthetic polyamide.…”

Optical, Dielectric, Magnetic, Photocatalytic, and Antibacterial Properties of Ga-Doped BiGaxFe1–xO3 Synthesized by the Microemulsion Approach

“…BiFeO 3 has an R 3 c space group and a deformed rhombohedral perovskite-type structure. According to the BFO literature, structural instability and significant current leakage are also listed as intrinsic limitations in BFO NPs. – Numerous researchers have worked hard to find solutions to these issues by enhancing the multiferroic properties, for instance, the substitution of rare-earth and metal ions, utilizing various fabrication techniques. In their study of Bi 1– x Ca x Fe 1– x Ti x O 3 NPs, Kumar and Singh found that the latent magnetism that had been trapped within the toroidal spin of BFO structure had been released, leading to enhanced magnetization.…”

“…Semiconductor-based photocatalytic processes, for instance, photocatalytic degradation of environmental toxins, photocatalytic water splitting for hydrogen evolution, and photoreduction of CO 2 to fuel molecules, have become increasingly important in solar energy conversion and environmental purification. Bismuth ferrite (BFO), a perovskite material with a relatively narrow band gap (2.2 eV), intrinsic electric polarization field, strong chemical strength, and low cost, has been proposed as a potential visible light-focused photocatalyst for removing contaminants. , However, BFO’s limited carrier mobility and quick recombination of photogenerated e – –h + pairs have hindered its photocatalytic efficiency. To enhance BFO’s photocatalytic activity, various methods have been developed, including cocatalyst loading, structural control, heterostructure assembly, and alien metal ion doping. ,,, Among these methods, doping BFO with foreign metal ions at the A or B site of the ABO 3 lattice is considered one of the most efficient approaches to increase photocatalytic efficiency.…”

“…To enhance BFO’s photocatalytic activity, various methods have been developed, including cocatalyst loading, structural control, heterostructure assembly, and alien metal ion doping. ,,, Among these methods, doping BFO with foreign metal ions at the A or B site of the ABO 3 lattice is considered one of the most efficient approaches to increase photocatalytic efficiency. Doping creates electron or hole trapping sites within the photocatalyst lattice, which enrich the formation of excited e – –h + pairs, resulting in enhanced photocatalytic capability of BFO. ,, …”

“…The sol− gel method offers advantage of homogeneous mixing of metals with precursors at molecular and atomic levels, without the formation of any secondary phases. 16 BiFeO 3 possesses a deformed rhombohedral perovskite-type structure and belongs to the R3c space group. However, the literature indicates that intrinsic limitations, including structural instability and significant current leakage, are associated with BFO NPs.…”