Co3O4 nanoparticles were synthesized via a simple Co-precipitation reaction between precursors of cobalt and NH3. The effect of different parameters such as concentration of NH3 and precursors of cobalt on the size and photocatalytic activity of the products was investigated. The achieved nanoparticles were characterized by X-ray powder diffraction analysis, field emission scanning electron mic...

To prevent Cr poisoning of the cathode and to retain high conductivity during solid oxide fuel cell (SOFC) operation, Cu or La doped Co-Mn coatings on a metallic interconnect is deposited and followed by oxidation at 750 ◦C. Microstructure and composition of coatings after preparation and oxidation is analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). High energy micro ...

Substitution of ionic platinum is carried out in Co3O4 host synthesized by solution combustion strategy. These Pt substituted spinels characterized XRD show pure crystalline phase without any separated peaks related to Pt/PtOx. Electrochemical OER activities these are investigated cyclic voltammetry, linear sweep voltammetry and chronoamperometry neutral, alkaline neutral buffer electrolytes. L...

Cobalt oxide has good catalytic activity for peroxydisulfate (PDS) activation but poor stability and is vulnerable to inactivation because of agglomeration. In this work, the chlortetracycline (CTC) degradation by catalysis using reduced graphene support cobalt (Co3O4/rGO) composite catalyst was investigated. It found that 86.3% CTC degraded within 120 min in Co3O4/rGO-800/PDS system. The influ...

Cobalt oxide/graphene oxide (Co3O4/GO) nanocomposites were synthesised using the co-precipitation synthesis process. The polycrystalline nature of Co3O4 nanoparticles onto GO sheets is studied by X-ray diffraction (XRD) pattern where found in with a particle size 35 nm. structural and morphological field emission scanning electron microscopy (FESEM) EDX, distribution on nanosheets was observed....

nanosized metal oxides dispersed polymer composites constitute a fascinating class of polymer composite materials. synthesis of such composite materials through solvent casting enhances the polymer synthetic technology. solvent casting method was used to prepare cobalt oxide (co3o4) dispersed poly (methyl methacrylate) (pmma) nano composite. x-ray diffraction tool is used to know the structural...

In this work, a one-dimensional Co3O4@TiO2 core-shell electrode material with superior electrochemical performance is fabricated by a convenient and controllable route. The approach involves two main steps: the homogeneous deposition of polydopamine and TiO2 layers in sequence on the cobalt coordination polymer and the thermal decomposition of the polymer matrix. The as-prepared electrode mater...

In this study, we utilized nano-sized Co3O4 and reduced graphene oxides (rGOs) as composite anode materials for Li-ion batteries. The Co3O4/C was derived from ZIF67 (Zeolitic Imidazolate Framework-67) wrapped in rGOs through precipitation. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM) were used to identify the crystal structure, phase purity, surface morphology...

We present herein the first in situ site-selective XAS experiment performed on a proof-of-principle transformation of a mixed-valence compound: the calcination of the K0.1Co(II)4[Co(III)(CN)6]2.7·20H2O Prussian Blue analogue (containing Co(2+) and Co(3+) ions in two different Oh sites) into Co3O4 (containing Co(2+) ions in a Td site and Co(3+) in an Oh site). By recording the Co K-edge X-ray ab...

We revealed an interesting facet-dependent electrochemical behavior toward heavy metal ions (HMIs) based on their adsorption behaviors. The (111) facet of Co3O4 nanoplates has better electrochemical sensing performance than that of the (001) facet of Co3O4 nanocubes. Adsorption measurements and density-functional theory (DFT) calculations reveals that adsorption of HMIs is responsible for the d...