We have determined the crystal structure of the title compound, which has a triclinic cell with cell parameters of a=6.844Å, b=6.933Å, c=9.339Å, α=76.617°, β=84.188°, γ=74.510° and space group P1¯. The crystal structure suggests the chemical formula CoMoO 4 ·3/4H 2 O. The...
Activated carbon‐supported cobalt molybdate (CoMoO4/AC) composite was conveniently fabricated using a simple hydrothermal route and high‐temperature calcination, aiming to create a novel heterogeneous catalyst for activation of peroxymonosulfate (PMS) to degrade organic dyes. The CoMoO4/AC cat...
In order to recover molybdenum and cobalt from spent hydrodesulphurization (HDS) catalysts, a hydrometallurgical process consisting of leaching, solvent extraction and precipitation was developed. The Mo and Co in the spent HDS catalysts were leached in HCl solution. Mo was first separated by so...
Reaction kinetics and a proposed mechanism for the oxydehydrogenation of propane over Ni 0.5 Co 0.5 MoO 4 /SiO 2 are described. The reaction pathway proceeds by propane oxydehydrogenation yielding propylene as the exclusive primary product. The propylene thus form...
CoMoO4 nanoflake-assembling porous pillar array is synthesized on Ni foam by a facile hydrothermal method. XRD, SEM and TEM demonstrate that CoMoO4 nanoflakes like flower petals cross and stack to form the porous pillar. As electrode materials of supercapacitors, CoMoO4 nanoflake-assembling poro...
New tungsten-doped CoMoO4 (W-CoMoO4) was successfully synthesized by a simple co-precipitation method and investigated for a possible application in oxygen evolution reaction (OER). The effect of W6+ doping on structure, morphology, and chemical compositions was investigated by X-ray diffraction...
X-ray structures are presented of three new cobalt complexes prepared from Co(III) and N,N ' -1,10-phenanthroline-5,6-dione. The cis-aqua-chloro-bis(N,N ' -1,10-phenanthroline-5,6-dione)cobalt(II) nitrate trihydrate (3) and the cis-aqua-bromo-bis(N,N ' -1,10-phenanthrolin...
Fe x Co 1−x alloy nanoparticles of spherical (x=0.25, 0.68, 0.85), hollow spherical (x=0.60) and sheet like (x=0.60) shapes were prepared at room temperature by reduction of iron chloride tetrahydrate and cobalt chloride hexahydrate with sodium borohydride, using N-Cetyl-N,N,N-tr...
Mass-transport processes within the boundary layers for the metastable-phase growth of potassium dideuterium phosphate (DKDP) crystals have been studied by holographic phase contrast interferometric microscopy (HPCIM) and laser diffractometry. The relationship between the growth rates of the sta...
Upconversion luminescence in erbium-doped PbGeO 3 –PbF 2 –CdF 2 -based vitroceramic under 1540nm infrared excitation is investigated. Luminescence signals around 410, 525, 550, 660 and 850nm were generated and attributed to the 2 H 9/2 , 2 H ...
Absorption and luminescence measurements have been performed on aluminum fluorophosphate glasses in the system AlF 3 -MgF 2 -CaF 2 -SrF 2 -BaF 2 -YF 3 -ZrF 4 -NaPO 3 , doped with 0.1 and 1 mol% Er 3 + . A green-to-blue u...
Spectroscopic analysis of Pr 3+ and Er 3+ ions in fluoride and oxide systems belonging to the same heavy metal glass family has been reported. From absorption and emission spectra using Judd–Ofelt theory various spectroscopic parameters like radiative transition rates, luminesce...
Passive Q-switched and mode-locked operation of a 2.7-μm fluorozirconate fiber laser is reported. Both mode-locking and Q-switching were attained by means of InAs epilayers used as saturable absorbers. Another technique used was the so-called flying-mirror mode-locking, whereby an external reso...
Rare earth glasses with high doping concentrations are candidates for the production of eye-safe microchip lasers for use as transmitters and detector amplifiers in laser radar systems and as transmitters in ultrahigh data rate communication systems. Presently only low concentrations of rare ear...
The role of 850-nm fluorescence, amplification, and laser emission in ZBLAN:Er³⁺ optical fiber was first investigated by Whitley et al. [1,2] and Allain et al. [3]. In the case of a green upconversion fiber laser at 544 nm, the 850-nm fluorescence is a parasitic component, so it should be minimi...
To the best of our knowledge, we explore, for the very first time, the performance using Raman-EDFFA hybrid amplifier for super dense multiplexing system. We evaluate the system in terms of flat gain, noise figure, and good rating quality factor for L-band. A highest flat gain of 26.01 dB is obs...
Statement of problem. In addition to conventional glass ionomers, a considerable number of different types of materials have been formulated to release fluoride. Variation in composition results in quantitative differences in the amount of fluoride release by these materials. Purpose. This study...
Sodium yttrium fluoride (β‐NaYF4) nanowires (NWs) with a hexagonal crystal structure are synthesized using a low‐cost hydrothermal process and are shown to undergo laser refrigeration based on an upconversion process leading to anti‐Stokes (blueshifted) photoluminescence. Single‐beam laser ...
YbF3-doped and 1 mol% PbF2 co-doped CaF2 crystals were grown by vertical Bridgman method using a shaped graphite furnace in vacuum. Dielectric spectra and optical absorption spectra were measured in order to study the influence of Pb2+ ions on the charge compensating defects formation. The influ...
An output pulse energy of 17.3 mJ has been achieved with a diode-pumped Yb:CaF2 regenerative laser amplifier. The bandwidth of the output pulse spectrum was 7.3 nm, being seeded with femtosecond pulses stretched to 2.2 ns. In cw operation a tuning range of 80 nm has been observed. A maximum puls...
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