XPS is exploited to study the composition, the chemical state and the cation distribution of metals in CoFe ₂ O ₄ .

MCM-41 is proposed to build mesostructured γ-Fe₂O₃-based sorbents as an alternative to other silica or alumina supports for mid-temperature H₂S removal.

Bi-magnetic core–shell spinel ferrite-based nanoparticles with different CoFe₂O₄ core size, chemical nature of the shell (MnFe₂O₄ and spinel iron oxide), and shell thickness were prepared using an efficient solvothermal approach to exploit the magnetic coupling between a hard and a soft ferrimagnetic phase for magnetic heat induction. The magnetic behavior, together with morphology, stoichiometry, cation distribution, and spin canting, were investigated to identify the key parameters affecting the heat release. General trends in the heating abilities, as a function of the core size, the nature and the thickness of the shell, were hypothesized based on this systematic fundamental study and confirmed by experiments conducted on the water-based ferrofluids.

This review highlights the ability of the redox-active quinone–semiquinonecorein tuning and/or switching the physical properties of quinone-based 2D frameworks and nanostructures and the potential of these materials in current/future technological applications.

Nanostructured spinel ferrites with formula M²⁺Fe2O4 (where M²⁺ ═ Fe, Co, Mn, Ni, Zn, etc.) represent a class of magnetic materials widely employed in different research fields, due to the possibility of finely tuning the magnetic properties by changing the chemical composition, size, shape, capping agents, etc. Herein, a review of the most common chemical synthesis in liquid media, distinguishing among aqueous and non-aqueous routes, is presented. The experimental procedure together with the mechanism, advantages and disadvantages, and examples are illustrated for each synthetic strategy.