3D printed monoliths: From powder to an efficient catalyst for antibiotic degradation.

To improve the effectiveness and durability of wastewater treatment technologies, researchers are showing a growing interest in 3D printing technology. This technology has attracted significant interest owing to its ability to fabricate challenging complex geometries using different material compositions. This manuscript is focused on the development of 3D monoliths from noncommercial filaments, i.

Direct 3D printing of zero valent iron@polylactic acid catalyst for tetracycline degradation with magnetically inducing active persulfate.

Catalyst stability has become a challenging issue for advanced oxidation processes (AOPs). Herein, we report an alternative method based on 3D printing technology to obtain zero-valent iron polylactic acid prototypes (ZVI@PLA) in a single step and without post etching treatment. ZVI@PLA was used to activate persulfate (PS) for the removal of Tetracycline (TC) in recirculating mode under two different heating methodologies, thermal bath and contactless heating promoted by magnetic induction (MIH).

Highly Efficient T2 Cobalt Ferrite Nanoparticles Vectorized for Internalization in Cancer Cells.

Uniform cobalt ferrite nanoparticles have been synthesized using an electrochemical synthesis method in aqueous media. Their colloidal, magnetic, and relaxometric properties have been analyzed. The novelty of this synthesis relies on the use of iron and cobalt foils as precursors, which assures the reproducibility of the iron and cobalt ratio in the structure.

Hydride-Reduced EuSrFeO: A T-to-T' Conversion Enabling Fe in Square-Planar Coordination.

Low-temperature reaction of A-site-ordered layered perovskite EuSrFeO (T structure) with CaH induces a shift in the EuO slabs to form EuSrFeO with a T' structure (4/ space group) in which only the Fe cation is reduced. Contrary to the previously reported T' structures with Jahn-Teller-active d cations (Cu and Ni), stabilization of EuSrFeO with the Fe (d) cation reflects the stability of the FeO square-planar unit. The stability of T'-type EuSrFeO over a T-type polymorph is confirmed by density functional theory calculations, revealing the d occupancy for the T' structure.

Soft Magnetic Switching in a FeSrYCuO Superconductor with Unusually High Iron Valence.

Ozone oxidation has allowed the stabilization of a very high iron oxidation state in the FeSrYCuO cuprate, in which a long-range magnetic ordering of the high valent iron cations coexists with the superconducting interactions ( = 110 K > = 70 K). The somewhat unexpected A-type AFM structure, with a μ(Fe) ∼ 2 μ magnetic saturation moment associated with the hypervalent iron sublattice, suggests an unusual low spin state for the iron cations, while the low dimensionality of the magnetic structure results in a soft switching toward ferromagnetism under small external magnetic fields. The role of the crystal structure and of the high charge concentration in the stabilization of this unusual electronic configuration for the iron cations is discussed.