The SiO2 supported cobalt-iron nano catalysts were prepared by the sol-gel method. This research investigated the effects of (Co/Fe) wt.%, different Co/Fe ratio at different temperature and loading of KCl wt.% for Fisher-Tropsch synthesis (FTS). The results were showed that the catalyst containing 50 wt.% (Co/Fe)/SiO2 (Co/Fe ratio is 70/30) which promoted with 0.6 wt.% KCl is an optimal nano ca...

Ethan P. Shapera and André Schleife have constructed, validated, applied machine learning models to search an online database for potential new plasmonic materials (see article number 2200158). The authors predict three high-quality-factor metals: AlCu3 (bottom on the cover, plasma frequency = 9.0 eV), ZnCu (middle, 9.59 ZnGa3 (top, 10.64 eV). Furthermore, is found no interband optical absorpti...

The kagome Heisenberg antiferromagnet formed by frustrated spins arranged in a lattice of corner-sharing triangles is prime candidate for hosting quantum spin liquid (QSL) ground state consisting entangled singlets. But the existence various competing states makes convincing theoretical prediction QSL difficult, calling experimental clues from model materials. materials Zn-barlowite ZnCu$_{3}$(...

We provide a discussion of the density and photoexcitation sensitivity of the X-ray spectra of Fe L-shell ions (Fe XVII–Fe XXIV) calculated with the Livermore X-ray Spectral Synthesizer, a suite of IDL codes that calculates spectral models of highly charged ions based primarily on HULLAC atomic data. These models are applicable to collisionally ionized laboratory or cosmic plasmas with electron...

in this study a new simple selective and sensitive spectrophotometric procedure for determination of fe(iii) is described. it is based on the formation of a colored complex between ferric iron and ethyl maltol, a strong and highly selective ligand for fe(iii). after mixing sample and reagent, and incubating at the room temperature, fe(iii)-ethyl maltol complex was extracted with different solve...

Iron-60 (t1/2= 2.62Myr) is a short-lived nuclide that can help constrain the astrophysical context of Solar System formation and date early Solar System events. A high abundance of Fe(Fe/Fe ≈ 4 × 10) was reported by in situ techniques in some chondrules from the LL3.00 Semarkona meteorite, which was taken as evidence that a supernova exploded in the vicinity of the birthplace of the Sun. Howeve...

Introduction: Fe (T1/2= 1.49 My) is a key a short-lived radioactive nuclide because it is the only one for which an origin from irradiation by cosmic rays is impossible. Fe is a neutron-rich nuclei and its production rate during irradiation processes around the early Sun (because of the low cross sections of appropriate reactions and of the low abundance of targets) is at least two orders of ma...

Ni-Fe/Si3N4 nanocomposite coatings with various ratio of Si3N4 to Na-saccharine were prepared by electrodeposition technique. The effect of Si3N4 nanoparticulates in the Ni-Fe nanocomposite coatings was investigated in relation to the ratio of Si3N4 to Na-saccharine in the plating bath. X-ray diffraction analysis showed that the Ni-Fe nanocomposite coating has face center cubic structure (FCC)....