Prolonged development of ore deposits, beneficiation and metallurgical smelting concentrates result in the accumulation wastes, forming large-scale dumps sludge ponds negatively affecting environment human health. The creation introduction industrial waste treatment technologies will make it possible to dispose them with production valuable commercial products improve environmental situation. I...

Silicon is an appealing lithium-ion battery anode material; unfortunately, it confronted with unsatisfactory cyclability owing to its large volume change. Herein, we design a unique ternary composite material (Si/Cr2O3/C), where the Si nanoparticles are confined in carbon-coated chromium oxide multi-shell hollow spheres (MSHSs). Encapsulating MSHSs effectively boosts available free space for ch...

Hybrid nanocomposites based on ferrimagnetic (FiM) Fe3O4 and magnetoelectric antiferromagnetic (AFM) Cr2O3 nanocrystals were synthesized to offer a particular three-dimensional (3D) interface between the two oxides. This interface favours an intermixing process (demonstrated by combining Raman spectroscopy and magnetization measurements) that determines the final magnetic behavior.

The molecular structures, oxidation states, and reactivity of 3 and 6% CrO3/ZrO2 catalysts prepared by incipient wetness impregnation were examined under different conditions. The in situ Raman spectroscopic studies under dehydrated conditions reveal that the 3 and 6% CrO3/ZrO2 catalysts possess equal amounts of monochromate and polychromate species. Consequently, monolayer coverage on this ZrO...

Cr2O3 nanoparticles were prepared using Cr(NO3)3.9H2O as starting material, triethanolamine (TEA) as template and water as green solvent under microwave irradiation. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), photoluminescence (PL) and Raman spectroscopy. The size distribution of individual particles we...

In this study, the Cr2O3/[email protected]2 composite was synthesized via calcination of yolk–shell [email protected]2. The presented core–shell structure, where Cr-doped TiO2 and Cr2O3/C were shell core, respectively. introduction Cr3+ Cr2O3/C, which derived from MIL-101, in enhanced its visible light absorbing ability lowered recombination rate photogenerated electrons holes. large surface ar...