Lanthanum of about 99·8 per cent purity was obtained from didymium chloride using two batch multistage countercurrent extraction cascades with 1 M D2EHPA as solvent. In the first cascade the La was concentrated in the raffinate, and in the second cascade the La was purified. The over-all recove...

Analysis of didymium (Di) and praseodymium molybdate crystals were carried out using energy dispersive X-ray fluorescence (EDXRF). The assigned empirical chemical formulae of the composites were tested and verified by the EDXRF technique by estimating experimental major elemental concentration r...

Unplanned oxidation of molybdenum(V) in the presence of carboxylic acid afforded three fully-oxidized polynuclear oxomolybdates. In very similar reaction mixtures, the initial oxidation state of the metal ion was retained and species with the frequently-encountered dinuclear {MoV(O)(μ2-O)2MoV(O...

Herein, a facile and green one-pot route was firstly developed for in situ grown Au nanoparticles on oxygen deficient molybdenum oxide nanosheets (MoOx-AuNSs) without extrinsic reductant. The change of molybdenum‑oxygen bonds and transformation of valence state of Mo element from Mo4+ and Mo5+ t...

Nanoporous titanium oxides are synthesized using a galvanostatic-tensiostatic method in electrolytes based on ethylene glycol solvent with water and ammonium fluoride additions. The porosity of the oxides is estimated by re-anodization in a suitable non-dissolving electrolyte, their optical prop...

Highly dispersive ammonium dimolybdate crystals with high purity have been prepared through reaction–evaporation–crystallization united route using commercial molybdenum oxide as starting material. The as-prepared ammonium dimolybdate uniform crystals were systematically characterized by X-ray...

We report a simple and effective route to synthesize, disperse, exfoliate and process different molybdenum-based 2-dimensional (2D) materials. Starting from a reaction between ammonium molybdate and ammonium sulfide solutions, a powder consisting of a mixture between amorphous molybdenum oxide a...

The present work addresses the recovery of rhenium from scrub liquor of molybdenite concentrate roasting fume and dust by solvent extraction method. According to the results, recovery of rhenium from the scrub liquor is not practical unless molybdenum is removed in advance. The extraction of mol...

The oxidation roasting process of molybdenum concentrate has significant advantages in industrial applications. However, utilization of low-grade mineral has many problems because it is more complex than the standard concentrate. In this study, the oxidation behaviors of powdery rhenium-bearing ...

Searching for high-efficiency and earth-abundant electrocatalysts towards hydrogen evolution reaction (HER) is one of the most promising pathways to ameliorate environmental contamination. In this work, we report a facile protocol to achieve the synthesis of the coupled molybdenum carbide and mo...

A new process for the removal of molybdenum from ammonium tungstate solutions using solvent extraction with quaternary ammonium salt extractant was proposed. The molybdenum can be selectively extracted over tungsten using a solvent extraction system consisting of 10% (v/v) N263 as extractant and...

Molybdenum sulfide is widely used as an additive in lubricated systems due to its van der Waals forces and its sliding sheets that produce low friction coefficients. Different morphologies and chemical compositions have been tested with good performance. In all circumstances, the behavior of sul...

Highly modified borate glasses with the composition (1 − 2x)MnO–x(SrO–B2O3) (x = 0.46, 0.42, 0.36, 0.25, and 0.20) were prepared and investigated by Raman, infrared (IR), and electron paramagnetic resonance (EPR) spectroscopy. Optical properties were studied in regard to photoluminescence, opt...

Strontium alumino borate glasses doped with Mn2+ ions (SABM) have been prepared and characterized by XRD, density, Electron paramagnetic resonance (EPR), FT-IR and Raman to investigate the spectral and physical properties of the present glass samples. The FTIR spectra revealed the presence of BO...

Structure of manganese borate glasses (MnO)X(B2O3)1−X (X=0, 0.21, 0.30, 0.35, 0.44) were investigated by high-energy X-ray diffraction (HEXRD) measurement at 61.5 keV. The composition dependence of the glass structure was discussed with the total correlation functions, T(r). It was found that th...

Glasses with composition 10SrO:(30−x)ZnO:60B2O3:xMnO, 0≤x≤0.9 (all compositions in wt%) have been prepared and investigated by X-ray diffraction, EPR, Optical absorption and FT-IR spectroscopic techniques. The XRD pattern of all the glasses confirmed the formation of an amorphous structure. Th...

A monomeric manganese(II) catecholato complex with hydrotris(3-tert-butyl-5-isopropyl-1-pyrazolyl)borate (TptBu,iPr) was synthesized and characterized. X-ray analysis of the compound shows a tetrahedral manganese coordinated to one oxygen atom of the catecholato ligand and three nitrogen atoms o...

Trimethyl borate (TMB) and triethyl borate (TEB) are used as film-forming electrolyte additives for high voltage Lithium nickel manganese oxide (LNMO) cathode. DFT calculation and initial charge curve of LNMO reveal that the oxidation activity of TEB is higher than that of TMB. Addition of 2% TM...

Zinc Alumino lithium borate (ZnAlLiB) glass system containing manganese ions has been investigated by the UV-visible, Electron Paramagnetic Resonance (EPR) and Fourier Transform Infrared (FTIR) spectroscopic studies. The variation in physical parameters infers that the environment around mangane...

The transparent manganese-lithium borate glasses were successfully prepared by melt-quench technique. The effect of the Mn content in the glasses on structure-function was characterized by conventional techniques e.g. XRD, SEM, TEM, XPS, UV–Vis and VSM. The vitreous samples exhibit pseudo capac...