Structure–redox reactivity relationships in Co_1−xZn_xFe₂O₄: the role of stoichiometry

Abstract

The strong relation between the cationic distribution and catalytic properties of Co–Zn ferrite nanoparticles was studied and the new antistructure modeling approach has been proposed for identification of the active centers in the redox reaction.

In-depth structural characterization and magnetic properties of quaternary ferrite systems Co0.5Zn0.25M0.25Fe2O4 (M = Ni, Cu, Mn, Mg)

“…In order to obtain ferrite nanoparticles with specific properties many synthesis methods were developed e.g. co-precipitation, sol-gel, hydrothermal, solvothermal, thermal decomposition, microemulsion, polyol approach, electrochemical, mechanical milling and laser ablation [4,[19][20][21][22] . Synthesis of CoFe 2 O 4 was studied by many research groups, Briceno et al detailed the influence of pH, reaction time and calcination temperature on size and magnetic properties using a co-precipitation route [23] .…”

Spinel ferrite (AFe2O4)-based heterostructured designs for lithium-ion battery, environmental monitoring, and biomedical applications

“…More than for other synthetic nanomaterials, the choice of synthetic methodology used for spinel ferrites is in particular considered to be one of the most crucial factors for creating various nanostructures with many unique features in terms of size, shape, orientation, aspect ratio, surface area, purity, and stability. In previous reports, some potential synthetic techniques for the preparation of SFNs based on top-down and bottom-up approaches have been mentioned, for instance, co-precipitation, hydrothermal methods, sol-gel methods, microwave methods, electrochemical deposition processes, and microemulsion methods as bottom-up approaches, 2,6,[23][24][25][26] and milling and pulsed laser ablation methods as top-down approaches. 27,28 Firstly, it should be stressed that a coprecipitation strategy is the most effective simple method for synthesizing SFNs because it involves the physical mixing of metallic salts containing divalent and trivalent cations at a molar ratio of 1 : 2.…”

The Presented Study of Zn-Cu Ferrites for Their Application in “Photocatalytic Activities”

“…Various synthesis techniques are used to prepare ZnCu ferrite nanoparticles such as the sol-gel method [62], spray pyrolysis process [63], co-precipitation method [64], citrate precursor method [65]. By doping other elements or oxides the structural, electrical, and magnetic properties of ZnCu ferrite can be improved, leading to an increase in saturation magnetization and a decrease in coercivity in the soft ferrites.…”

“…Properties of these nanomaterials can be modified by substitution of diamagnetic or Ferrites -Synthesis and Applications paramagnetic cations and their distribution in the spinel structure which alters the grain sizes, distribution, and surface morphology. The attribution of ZnCu ferrites is dependent on the synthesis methods and concentration of doping [50]. Cu-Zn spinel ferrites possess excellent magnetic behavior that depends on the concentration of Zn2+ ions in CuFe2O4.…”