Su et al. used a hydrothermal process to produce nanocrystals of meso-ZnFe2O4 by reacting cetyltrimethylammonium bromide (CTAB) with ZnFe2O4. The quantity of ZnFe2O4, the concentration of H2O2, and the degradation of Acid Orange II (AOII) at various sintering temperatures were used to assess the photocatalytic activity of ZnFe2O4 under visible light. Furthermore, ZnFe2O4 preserved its degradation effectiveness throughout multiple subsequent batch runs, illuminating the accurate photocatalytic mechanism. Liu et al. created a NiFe2O4 NPs magnetic species that catalyzed the degradation of RhB in the presence of oxalic acid through a photo-Fenton catalytic property. The best breakdown rates were achieved at pH 3.0 with 1.0 mM oxalic acid. The magnetic catalyst was highly active, extremely stable, and simple to separate using an external magnet, according to seven cyclic tests for the deterioration of RhB. Thus, this magnetic catalyst shows promise for the removal of organic pollutants. Owing to the synergistic interactions between Fe and Cu ions, CuFe2O4 containing Cu + ions can serve as highly effective heterogeneous Fenton catalysts. As a result, a technique by Moreno-Castilla, Carlos, et al. for creating CuFe2O4 nanospheres (CFNS) was chosen that also allows cuprite to develop, yielding a CFNS composite that was then calcined at a temperature of 400 °C. Nearly all of the phenols had been completely degraded after 95% elimination of the total organic carbon (TOC). Three spinel ferrites CuFe2O4, MgFe2O4, and ZnFe2O4 were the subject of a study by Kurian, J. et al. examined their structural, optical, and magnetic characteristics. Under the same physical circumstances, these ferrites were made in an autoclave using various liquid media and surfactants. In the hydrothermal method, water was used as the medium and trisodium citrate as the surfactant. In the solvothermal approach, ethylene glycol was utilized as the solvent while polyethylene glycol served as the surfactant. As heat sources for magnetic hyperthermia therapy, Fotukian, Seyedeh Maryam, et al. planned to prepare monodisperse CuFe2O4 and Fe3O4 NPs in this study utilizing a solvothermal approach. This is the first report on the solvothermal synthesis of monodisperse CuFe2O4 NPs with an average particle size < 50 nm, as far as in the literature.