Cobalt oxides, CoO and Co3O4, were obtained from Co (II) acetate tetrahydrate. The thermal decomposition pathway of the starting product was followed by combining thermogravimetric analysis in situ X-ray thermodiffraction. Under a nitrogen atmosphere, cobalt monoxide with Zn-blende rocksalt polymorphs could be almost as single phases at 330 400 °C, respectively. In addition to these oxyacetate,...

Co3O4, MgCo2O4 and MgO materials have been synthesized using a simple co-precipitation approach systematically characterized. The total conversion of toluene to CO2 H2O over spinel with wormlike morphology has investigated. Compared single metal oxides (Co3O4 MgO), the highest activity exhibited almost 100% oxidation at 255 °C. obtained results are analogous typical precious supported catalysts...

Effects of supports (Co3O4, CeO2, NiO) in the gold-catalyzed aqueous phase oxidation ethanol (EtOH) to acetic acid (AcOH) were examined. ATR-IR spectroscopy under working conditions catalysts uncovered on gold particles bidentate ethoxy, and monodentate ethoxy species, multi-layered ethanol, acetate. Preferential formation species adsorbed EtOH identified as key factors for high activity select...

Thin films of cobalt oxides (CoO and Co3O4) fractal structures have been synthesized by using laser chemical vapor deposition at room temperature and atmospheric pressure. Various factors which affect the density and crystallization of cobalt oxides fractal shapes have been examined. We show that the fractal structures can be described by diffusion-limited aggregation model and discuss a new po...

Hematite (α-Fe2O3) and magnetite (Fe3O4) nanowires with the diameter of about 100 nm and the length of tens of micrometers have been selectively synthesized by a microemulsion-based method in combination of the calcinations under different atmosphere. The effects of the precursors, annealing temperature, and atmosphere on the morphology and the structure of the products have been investigated. ...

Cobalt oxide (Co3O4) nanoparticles were successfully prepared by sol–gel and hydrothermal methods for antibacterial photocatalytic applications with the addition of 1%, 4% nickel (Ni), reduced graphene (rGO). The structural morphological properties obtained XRD, TEM FESEM techniques. showed typical crystallographic planes to cubic phase particles inferior diameter 30 nm. Ni-Co3O4 + rGO nanocrys...

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sphere-like shaped cobalt oxide nanoparticles (co3o4) were synthesized by a simple wet chemical method using cobalt chloride as precursor and cetyl trimethylammonium bromide (ctab) as surfactant. their structural and surface morphologial properties were characterized by high resolution transmission electron microscopy (hrtem), field emission scanning electron microscopy (fesem) and x-ray diffra...