Synthesis and Characterization of Copper Ferrite Nanoparticles

Abstract

Copper ferrite CuFe2O4 nanoparticles were synthesized by sol-gel method with different annealing temperatures (200, 450, 650 and 850) °C. Structural, morphological, magnetic and electrical properties were studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM) and LCR meter. The XRD patterns showed the system structure in Cu-ferrite had deformed at 650 °C from a cubic to a tetragonal system with apparrent a secondary phase CuO. Lattice constant decreases with increasing annealing temperatures, while crystalline volume increases. The FT-IR spectrum of sample under investigations shows two significant absorption bands, which refer to the formation of a single-phase cubic spinel. Magnetization revealed a soft ferromagnetic behavior for the composition sintered at 850 °C. The saturation magnetization, remnant magnetization, and coercivity were 32 emu.g−1, 11.64 emu.g−1, 517.16 emu.g−1, respectively. The electrical measurement of sample shows decrease in the real and imaginary part of dielectric constant with increasing frequency while and AC conductivity increasing.

Copper Ferrite Nanoparticles Synthesized Using Anion-Exchange Resin: Influence of Synthesis Parameters on the Cubic Phase Stability

“…Some of these conditions are often not controlled properly, which may explain why the experimental results obtained in different research papers do not correlate with each other. At the same time, the magnetic parameters of the copper ferrite nanoparticles measured here are in agreement with those reported elsewhere: Ms = 31.4 emu/g, Hc = 400.3 Oe [ 20 ]; Ms = 27.4 emu/g, Hc = 526.6 Oe [ 21 ]; Ms = 41.1 emu/g, Hc = 241 Oe [ 66 ]; and Ms = 32.4 emu/g, Hc = 517 Oe [ 67 ].…”

Copper Ferrite Nanoparticles Synthesized Using Anion Exchange Resin: Influence of Synthesis Parameters on the Cubic Phase Stability

“…Some of these conditions are often not properlly managed, that may explain why the experimental results obtained in different research papers do not correlate to each other. At the same time, the measured here magnetic parameters of copper ferrite nanoparticles are in agreement with those reported elsewhere: Ms = 31.4 emu/g, Hc = 400.3 Oe, [19], Ms = 27.4 emu/g Hc = 526.6 Oe [20], Ms = 41.1 emu/g Hc = 241 Oe [60], Ms = 32.4 emu/g, Hc = 517 Oe [61].…”

A new approach to the synthesis of CuFe2O4@CeO2 direct Z‐scheme with a core‐shell structure for enhanced photo‐degradation of methyl violet under ultraviolet and visible‐light irradiation

“…In the case of pure CuFe 2 O 4 , the CB edge potential of CuFe 2 O 4 is located at a more positive location (0.64 eV) than the standard redox potential of O 2 / (−0.33 eV vs. NHE) which suggests that the photo induced electrons on its CB cannot reduce O 2 to (Figure 9a). 61–63 Similarly, the holes in the VB of CeO 2 cannot react with H 2 O or OH − to generate ˙OH as the VB potential of CeO 2 (1.61 eV vs. NHE) is less than the standard redox potential of OH − /˙OH (1.99 eV vs. NHE) 61 and also the CeO 2 can be excited only by UV‐light irradiation. Under UV‐light irradiation, had the charge transfer in the composite followed traditional type‐II mechanism (Figure 9d); the CuFe 2 O 4 @CeO 2 should absorbs photons to generate the electrons in CB of CeO 2 and then jumps onto the less negative CB of the CuFe 2 O 4 photocatalyst.…”