Based on the leaching solution of tungsten secondary resource, the metal separation properties of tungsten-containing systems such as the W-Mg-Si-H2O, the W-Al-H2O, the W-Fe-Mo-H2O and the W-Ca-V-H2O, were investigated by theoretical E-pH diagrams and experiments. The results demonstrated that t...

Tungsten coatings with high (2 2 0)-orientation were formed on V alloy substrate by pulse current electrodeposition in air atmosphere. The coatings’ microstructure, crystal structure and adhesive strength between coatings and substrates were investigated. It could be observed the tungsten coati...

This paper presents a novel method of electrochemical extraction of tungsten from tungsten carbide (WC) scrap in the molten NaCl–KCl salt. WC was used as a consumable anode and dissolved electrochemically to extract tungsten at 1023 K. In this method, the kinetics of the WC anode was analyzed t...

The reaction of tin tetrachloride with a series of variously substituted α-hydroxyphosphonates (L) in anhydrous dichloromethane produces new octahedral tin complexes of the type [SnCl4L2]. These adducts were characterized by multinuclear (1H, 13C, 31P and 119Sn) NMR, IR spectroscopy, and elemen...

By cumulative assembly of tungsten vanadate (WV2O7) nanorods, novel two-dimensional (2D) nanosheets of interwoven tungsten vanadate were hydrothermally formed on graphene. When as-prepared material was applied into a supercapacitor electrode using H2SO4 electrolyte, it was clarified that chargin...

The reactions of tungsten(V) chloride and bromide with several primary, secondary and tertiary aliphatic amines have been studied. Aminolysis of three tungsten-halogen bonds takes place with primary amines, whereas with secondary amines reduction followed by solvolysis occurs, giving products of...

We synthesised a new type of photochromic tungsten oxide nanoparticles, analysed their photocatalytic activity and carried out a thorough analysis of their effect on prokaryotic and eukaryotic organisms. Ultrasmall hydrated tungsten oxide nanoparticles were prepared by means of hydrothermal trea...

Trinuclear [M3S4(OCH3)3](edpp)3]+ complexes, 1+ (M = Mo) and 2+ (M = W) bearing (2-aminoethyl)diphenylphosphine (edpp), have been isolated and fully characterized. Molybdenum and tungsten halide precursors react with methanol in the presence of Et3N, to yield the respective methoxo-terminated cl...

Effect of high pressure on ferroelectric diisopropylammonium bromide (DIPAB) is investigated using Raman spectroscopy and angle-dispersive x-ray diffraction (XRD) measurements using a diamond anvil cell up to ∼10 GPa. Raman spectroscopic studies indicate that the monoclinic (m-II) ferroelectric...

Leaching of tungsten from scheelite is critical for the reclamation of tungsten resources. Conventional approaches for tungsten leaching involve the problems of low efficiency, sophisticated equipment demand, or complicated follow-up issues. In this study, a resin-enhanced acid leaching method w...

In order to investigate an optimal concentration of fluoride in alkali chloride melt which the Ti(III) can be reduced into metallic titanium in one step, a systematic study of the electrochemical properties of Ti(III) was carried out in molten NaCl-KCl. KF was used as a source of fluoride ions, ...

The pentadentate ligand 2,6-diacetylpyridinedisemicarbazone, DAPSC, reacts with Th(NO3)4 in ethanolwater mixture and a di-μ-hydroxo Th(IV) dimer is formed. The compound [Th2(OH)2(DAPSC)2(NO3)2(H2O)2](NO3)4·4H2O (I) is monoclinic, space group P21/n with a = 10.705(1), b = 19.008(2), c = 11.78...

The synthesis of original crystalline thorium aspartate tetrahydrate, Th(C4NO4H6)4.4H2O, was performed using two different wet-chemistry routes, involving either L-asparagine or L-aspartic acid as complexing agent. Characterization of this compound through 13C NMR and PXRD led to confirm the ter...

In this work, we developed a simple, effective, low-cost and more environmentally friendly process (with low energy requirements and minimized effluent emissions) to recover molybdenum from an alkaline leaching solution of a spent hydrodesulphurisation catalyst, as a final product with high puri...

In order to prepare fluorescent material for white Light Emitting Diodes (LEDs), a new Eu3+ activated molyb-date phosphor SrMoO4 was fabricated with solid-state method. X-ray diffraction (XRD) showed that the doping of trivalent europium ion reduced the lattice parameters. The excitation and emi...

Eu3+-doped strontium molybdate red phosphors (Sr1−xMoO4:Eux (x = 0.01–0.2)) for white light-emitting diodes (LED) were synthesized by the solid-state reaction method. The fluorescent intensities of the as-prepared phosphors were remarkably improved. The excitation and emission spectra demonstra...

Perovskite-type SrMoO3 (SMO) is composited with commonly used electrolytes Y0.08Zr0.92O2 (YSZ), La0.8Sr0.2Ga0.8Mg0.2O3 (LSGM) and Gd0.1Ce0.9O2 (GDC) to form dual-phase materials, which are characterized as potential anode materials for solid oxide fuel cells. Introduction of any of the electroly...

Polycrystalline samples of perovskite-type strontium molybdate, SrMoO3, have been prepared and the thermal and electrical properties have been measured from room temperature to about 1000 K. The electrical resistivity is of an order of magnitude of 10−5 to 10−6 (Ω m) in the whole temperature ra...

We have synthesized strontium molybdates (SMO) SrMoO3 and Sr2MoO4, analogous to strontium ruthenates (SRO) e.g. the ferromagnetic metal SrRuO3 and the spin-triplet superconductor Sr2RuO4. Polycrystalline SrMoO3 and Sr2MoO4 show Pauli-paramagnetic susceptibility between 2 K and 300 K. There is no...

Quartz substrate supported Praseodymium (Pr) doped strontium molybdate (SrMoO4) thin films with good uniformity and outstanding fluorescent properties are successfully fabricated via a facile polymer-assisted deposition (PAD) method. In combination with the strong chelating effect of water-solub...