Annealing temperature effect on cobalt ferrite nanoparticles for photocatalytic degradation

Thermally induced oxygen related defects in eco-friendly ZnFe2O4 nanoparticles for enhanced wastewater treatment efficiencies

“…Previous reports related the stretching vibration change in Oxygen Raman band to oxygen vacancies in Zinc Ferrite (Arora and Sharma, 2021;Zhang et al, 2020). X-ray Photoelectron Spectroscopy (XPS) has been also applied widely to detect oxygen vacancies in ferrite crystal lattice (Peng et al, 2019;Sarkar and Khan, 2019;Swathi et al, 2021;. The O1s fitted spectra of ZFO-500, ZFO-600 and ZFO-700 are shown in Figure 3f.…”

“…A lower PL peak intensity for ZFO-500 was found in comparison to ZFO-600 and ZFO-700, which may be associated to the hole-electron recombination. The lower peak intensity could be attributed to the lower recombination rate which is related to the oxygen defects in the crystal lattice of ZFO-500 (Younis et al, 2016) (Swathi et al, 2021). Therefore, ZFO-500 is anticipated to possess slow electron-hole recombination as compared to their counter parts.…”

Enhancement of Magnetic and Dielectric Properties of Ni0.25Cu0.25Zn0.50Fe2O4 Magnetic Nanoparticles through Non-Thermal Microwave Plasma Treatment for High-Frequency and Energy Storage Applications

“…Micrographs also show that pristine NiCuZn ferrites demonstrated fuzzy grain boundaries with agglomeration among nanoparticles. Generally, agglomeration appeared because of high annealing temperature magnetic dipole–dipole interactions among the nanoparticles [ 35 ]. When the agglomeration phenomena dominated, the grains clumped together, reducing porous behavior.…”

A controllable one-pot hydrothermal synthesis of spherical cobalt ferrite nanoparticles: synthesis, characterization, and optical properties

“…[64][65][66] The absorption prole is inuenced by various factors such as synthetic method, lattice parameters, surface roughness, band gap, and impurity centers. 67 As depicted in the inset of Fig. 11, both CF-AG-0 and CF-AG-0.5 samples exhibited nearly the same absorption behavior with only one absorption edge in the visible region at wavelength of 765 and 735 nm, respectively.…”