Synthesis and characterization of a uranium oxide hydrate framework with Sr(II) ions: Structural insights and mixed uranium valences

A mixed-valence uranium oxide hydrate framework with Sr2+ ions (UOF-Sr2) was synthesized hydrothermally and characterized with multiple structural and spectroscopic techniques. Compound UOF-Sr2 crystallizes in monoclinic space group C2/c, having...

Synthetic uranium oxide hydrate materials: Current advances and future perspectives

Uranium oxide hydrate (UOH) materials, a group of minerals and synthetic phases, have attracted recent attention due to their highly structural flexibility and diversity, as well as their primary relationship...

Synergistic Effect of Nickel on Tungsten Oxide Hydrate (WO3.H2O) as Photoanode for Dye-Sensitized Solar cell

Tungsten oxide hydrate (PW) and Nickel tungsten oxide nanocomposites (NW NCs) namely NW1, NW2, NW3 and NW4 were successfully synthesized by the hydrothermal method. The synthesized NCs were characterized using advanced techniques such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV–visible spectroscopy and Photoluminescence (PL). XRD pattern shows the formation of face-centered cubic phase for PW and monoclinic/orthorhombic phase for NW respectively. The nanoflakes like morphology for NW NCs were confirmed by SEM. The MB dye was successfully degraded using NW4 NCs with a rate constant of 0.02266 /minute. The photovoltaic performance of the photoanodes with various weight percentages (wt%) of Ni was measured by recording the photocurrent-photovoltaic curves. The result indicated that NW4 NCs exhibited the best power conversion efficiency (PCE) with high short circuit current density (Jsc) and open-circuit voltage (Voc). This enhanced photocatalytic and photovoltaic performance of NWNCs may be due to the visible light-harvesting, increased dye loading capacity and reduced photoelectron recombination.

Chromium oxide pigments

The chromium(III) oxide pigments Cr2O3 (chromium oxide green) and CrOOH (chromium oxide hydrate green) are representatives of the inorganic green and blue–green pigments. Cr2O3 pigments are very important for the coloration of paints, coatings, plastics, building materials and other application systems. CrOOH pigments have lost their technical importance because of the low thermal stability. Chromium oxide green pigments are characterized by excellent application properties. They are synthesized starting from alkali dichromates or ammonium dichromate by reduction in liquid or solid phase.

A family of uranyl oxide hydrate phases with bivalent cations [MII(H2O)4][(UO2)3O3(OH)2]·H2O (MII – Mn, Co, Ni, Zn): synthesis, characterization and chemical stability in aqueous solutions

A series of new uranium compounds [MII(H2O)3][(UO2)3O3(OH)2]·2H2O (MII – Mn, Co, Ni, Zn) were synthesized for binding radionuclides in the environment and nuclear fuel cycle.