In the last ten years, the search for new application materials has become one of the “must” in the field of powder technology. Particularly, as regards solid lubricants, concerns in the use of compounds containing Lead and Antimony have been raised, since the former is classified as a carcino...

The solubility of iron sulfide and of lead sulfide in water was determined experimentally in the temperature range from 25 to 80 °C and at atmospheric pressure. The solubility of iron sulfide was determined by bringing precipitated iron sulfide in equilibrium with water and determining the conc...

Hierarchical nanostructures have attracted widespread interest owing to their unique properties compared to their bulk counterparts. Thus, they are considered promising electrocatalytic materials. In this work, a novel hierarchical porous nanocomposite of cobalt phosphide [email protected] mixed...

In this work, sodium silicate (SS) is used as silica precursor for the sol-gel reaction to prepare mesoporous chitosan-silica composite by a facile one-pot method. By using sodium silicate to replace the silane coupling agents that have been used for the modification of mesoporous materials in t...

The incorporation of radionuclides into low-temperature mineral hosts may strongly influence the concentration and migration of radioactive contaminants in the subsurface. One difficulty in evaluating the thermodynamics of incorporation is that experiments are often performed at high supersatura...

Understanding uranium (U) sorption processes in permeable reactive barriers (PRB) are critical in modeling reactive transport for evaluating PRB performance at the Fry Canyon demonstration site in Utah, USA. To gain insight into the U sequestration mechanism in the amorphous ferric oxyhydroxide ...

Biochar adsorption has been protruded as a sustainable green and economic process for water remediation. This technology is facing high challenges in removing different pollutants, owning to the stable chemical and physical features of biochar. Therefore, a novel nanocomposite of Liquidambar sty...

The photochemical generation of uranous ions U(IV) in the aqueous solution containing 40 mM uranyl nitrate, 1% (v/v) 2-propanol and/or 1% (v/v) acetone, in the presence of different concentrations of nitric acid has been investigated. The formation of U(IV) was investigated in six different ligh...

The fresh [email protected] Zeolite Imidazolate Framework-8 ([email protected]) was exploited as an prospective adsorbent for the removal and abruption of U(VI) ions from aqueous solutions for the first time. The material exhibited a latent adsorption capacity of 277.77 mg g−1 and an eminent sel...

Understanding the factors that govern aqueous solubility of uranyl minerals is important for predicting uranium mobility in groundwater and for designing effective remediation strategies. The uranyl-containing minerals metaschoepite [UO3∙(2H2O)] and uranophane [Ca(UO2)2(SiO3OH)2·5H2O] were synt...

The mode of coordination, mono-, bidentate, sulfate in UO2(SO4) and UO2(SO4)22−, and the relative energy of the various isomers have been studied at the DFT and MP2 levels using DFT-optimized geometry in a CPCM solvent model. The U–S distances in the mono- and bidentate coordination, 3.63 and 3...

The new uranyl aqua sulfate compound [({CH3}3N2C3H3{CH2COOH})(H3O)] [(UO2)2(SO4)3(H2O)]·1.5H2O was synthesized and the crystal structure determined. The two-dimensional uranyl-aqua sulfate compound exhibits a previously reported anionic structural unit topology, but features an interstitial com...

The uranyl tricarbonate moiety, exemplified by UO2(CO3)34−, CaUO2(CO3)32−, and Ca2UO2(CO3)3(aq), is potentially expected to consist of mobile uranyl(VI) species in the aquifer of a deep geological repository for spent nuclear fuel. Time-resolved laser fluorescence spectroscopy (TRLFS) for the U(...

We describe the internal electrochromic effect in V2O5 xerogel films caused by the redistribution of hydrogen ions inside the film, instead of insertion from the outside, i.e. from an electrolyte, as in the case of conventional electrochromism. A hypothesis is put forward according to which the ...

In graphene/silicon (Gr/Si) solar cell antireflection (ARCs) coatings remarkably enhance the power conversion efficiency. Traditionally titanium dioxide and polymethyl methacrylate used an ARC in Gr/Si solar cells. In such cases controlling film thicknesses and smoothness required a lot of effor...

The robust reduced graphene oxide (rGO)/vanadium pentoxide (V2O5)/polyaniline (PANI) nanocomposite with a weight percentage of rGO – 5.88%: V2O5 – 11.76%: PANI – 82.36%, was synthesized by facile insitu single step chemical method and fabricated into a supercapacitor device. The supercapacito...

Recently, rechargeable aqueous zinc-ion batteries have received considerable attention in relation to large-scale energy storage, mainly because of their advantages of environmental friendliness, non-toxicity, and favorable safety. However, little researches have been conducted on the cathode ma...

The paper describes the effect of hydrogenation of vanadium pentoxide thin films by plasma-immersion ion implantation on their composition, optical properties, and the internal electrochromic (IEC) effect. Variations in the composition and structure caused by the hydrogen insertion, as well as t...

This paper investigates the properties of the urchin-like hollow spheres of vanadium pentoxide (UHS V2O5) network device. The device exhibited high photocurrent of μA with 102 rectification ratio under illumination due to the formation of a network device structure that reduced junction barrier...

Low photocatalytic efficiency of visible light and fast recombination of photo-generated carriers are two challenges facing the applications of photocatalyst sterilant zinc oxide (ZnO). Meanwhile, both light and dark photocatalytic activities are important. It is of great theoretical and practic...