Copper-based nanoparticles prepared from copper(II) acetate bipyridine complex

The syntheses of CuO, Cu/Cu2O and Cu2O/CuO nanoparticles (NPs) from a single copper(II) acetate bipyridine complex by three different methods, microwave-assisted, solvothermal and borohydride, are reported. The presence of the bipyridine ligand in the copper complex would impose no necessity for additional stabilization during synthesis. The phases of formed NPs were identified by X-ray diffractio

Solvothermal Synthesis of Sm3+-doped Fe3O4 nanoparticles

Magnetic iron oxide nanoparticles doped with samarium were prepared by solvothermal polyol method. An introduction of 2,2'-bipyridine during the synthesis reduces the particle diameter to about 9 nm in average. The difference in physical and magnetic properties of the samples prepared with and without capping agent was outlined on the basis of complex characterization by a number of experimental techniques. The characteristics of resulted product make it suitable for biomedical applications, for instance, as a contrast agent for MR

Cobalt-based ZIF-68 and ZIF-69 as the precursors of non-platinum electrocatalysts for oxygen reduction

We report the microwave-assisted synthesis of Co-based ZIF-68 and ZIF-69 zeolitic imidazolate frameworks, which were enriched with iron(ii) acetate and 1,10-phenanthroline and then pyrolyzed to form heterogeneous catalysts. The materials demonstrated high activity in oxygen reduction and suitability as Pt-free catalysts for low-temperature fuel cell

Celluphot: hybrid cellulose : bismuth oxybromide membrane for pollutant removal

The simultaneous removal of organic and inorganic pollutants from wastewater is a complex challenge and requires usually several sequential processes. Here, we demonstrate the fabrication of a hybrid material that can fulfill both tasks: i) the adsorption of metal ions due to the negative surface charge, and ii) photocatalytic decomposition of organic compounds. The bio-inorganic hybrid membrane consists of cellulose fibers to ensure mechanical stability and of Bi4O5Br2/BiOBr nanosheets. The composite is synthesized at low temperature of 115 °C directly on the cellulose membrane (CM) in order to maintain the carboxylic and hydroxyl groups on the surface that are responsible for the adsorption of metal ions. The composite can adsorb both Co(II) and Ni(II) ions and the kinetic study con- firmed a good agreement of experimental data with the pseudo-second-order equation kinetic model. CM/Bi4O5Br2/BiOBrshowed higher affinity to Co(II) ions than to Ni(II) ions from diluted aqueous solutions. The bio-inorganic composite demonstrates a synergistic effect in the photocatalytic degradation of rhodamine B by exceeding the removal efficiency of single components. The fabrication of the biologic-inorganic interface was confirmed by various analytical techniques including SEM, STEM EDX mapping, XRD, and XPS. The presented approach for controlled formation of the bio-inorganic interface between natural material (cellulose) and nanoscopic inorganic materials of tailored morphology (Bi-O-Br system) enables the significant enhancement of materials functionality

ПОРІВНЯННЯ ІНФОРМАТИВНОСТІ МЕТОДІВ МАГНІТОКАРДІОГРАФІЧНОГО ТА ЕЛЕКТРОКАРДІОГРАФІЧНОГО КАРТУВАНЬ ЩОДО ВИЯВЛЕННЯ ОЗНАК ПОРУШЕНЬ ПРИ ІШЕМІЧНІЙ ХВОРОБІ СЕРЦЯ

The comparative analysis of methods of magnetocardiographic and electrocardiographic mapping in the aspect of their informativeness is represented in the article.В работе представлен сравнительный анализ методов магнитокардиографического и електрокар-диографического картирований в аспекте их информативности.У роботі представлено порівняльний аналіз методів магнітокардіографічного та електрокардіографічного картувань в аспекті їх інформативності

Copper-based nanoparticles prepared from copper(II) acetate bipyridine complex

The syntheses of CuO, Cu/Cu2O and Cu2O/CuO nanoparticles (NPs) from a single copper(II) acetate bipyridine complex by three different methods, microwave-assisted, solvothermal and borohydride, are reported. The presence of the bipyridine ligand in the copper complex would impose no necessity for additional stabilization during synthesis. The phases of formed NPs were identified by X-ray diffractio