Pyrolusite (β-MnO 2 ) was investigated for potential use in energy storage devices due to its promising properties cathode materials rechargeable lithium-ion batteries. A combination of evolutionary algorithm search techniques and density functional theory were used determine the structural stabilities β-MnO nanoclusters on landscape. However, pyrolusite suffers from some defects impurities tha...

The structural properties and activities of Cu-Co catalysts used in Fischer-Tropsch synthesis are explored according to their method of preparation. Impregnation, co-precipitation, and a novel method of thermal decomposition were applied to an inorganic precursor complex to generate the Cu-promoted alumina- and silica-supported cobalt catalysts. The precursors and the catalysts obtained by ...

Purpose This study aims to examine the effect of structural transformation on poverty alleviation in Sub-Saharan Africa (SSA) countries with a higher share services as percentage gross domestic product (GDP). The specifically focuses value-added GDP agricultural, manufacturing, industrial, and service sectors using time series data from 1988 2019. Design/methodology/approach utilizes autoregres...

The structure, IR absorption and luminescence spectra, morphology of Lu 0.99-x Sm x Eu 0.01 BO 3 (0≤ x≤0.99) orthoborates synthesized at 970 o C were studied. With an increase in the 3+ concentration, a successive change five structural states is observed: calcite x≤ 0.1)-> + vaterite (0.1<x<0.3)-> (0.3≤ 0.95)-> triclinic phase (0.95<x≤ 0.98)-> (...

   In this paper, a kind of core–shell magnetic mesoporous microspheres of Fe3O4@SiO2@meso-SiO2 with high surface areawas prepared, where magnetic Fe3O4 nanospheres were used as the inner core, tetraethyl orthosilicate (TEOS) as silica source, and cetyltrimethylamonium bromide (CTAB) as pore forming agent. Methanol-enhanced s...