Formaldehyde (HCHO) is recognized as one of the most emitted indoor air pollutants with high detrimental effect on human health. Significant research efforts are focused HCHO removal to meet emission regulations in an effective and economically profitable way. For over three decades, unique electronic properties catalytic abilities nano-gold catalysts continue be attractive area for community. ...

a new nano-sized cobalt(ii) coordination polymer, (col1).0.5dmf.1.5ch3oh(1); [h2l1 = 5-(4-carboxy phenyl azo) salicyilic acid] has been synthesized by a sonochemical method. the thermal stability of compound 1 was studied by thermo- gravimetric and differential thermal analyses. nano-structure of this coordination polymer was characterized by elemental analyses, ir spectroscopy,  powder x-ray d...

In this paper, the mer-Co(NH3)3(NO2)3 complex was used as a new precursor for synthesizing spinel-type cobalt oxide nanoparticles (Co3O4NPs).Thermal decomposition of the complex at low temperature (175 °C) resulted in the Co3O4NPs without using expensive and toxic solvents or complicated equipment. XRD, FT-IR, SEM, EDX, and TEM were employed to characterize the product, and its optical and magn...

Thermochemical heat storage is an important solar-heat-storage technology with a high temperature and energy density, which has attracted increasing attention research in recent years. The mono-metallic redox pair Co3O4/CoO realizes exothermic process through reversible reaction. Its basic principle to store by absorption reduction reaction during high-irradiation hours (high temperature) then ...

the potential of carbon nanotubes (cnt) supported cobalt catalysts for fischer-tropsch (ft) reaction is shown. using the wet impregnation method cobalt on carbon nanotubes catalysts were prepared with cobalt loading varying from 15 to 45 wt. %. the catalysts are characterized by different methods including: bet physisorption, x-ray diffraction, hydrogen chemisorption, and temperature-programmed...

Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage conversion devices due to the increasing demand from consumers. Therefore, fabrication of an emerging focus promotion dissemination storage/conversion devices. Spinel perovskite transition metal oxides have been widely explored as efficient electrocatalysts replace noble metals in...

The present study describes the effect of hydrolysis polyethyleneimines in water/ethanol mixture on morphology cobalt oxide (Co3O4), used as main sensor component. structure generated Co3O4 nanocrystals is consistent with a well-defined cubic phase crystallography, having only and oxygen elements. Developing simple, low-cost, sensitive, selective cholesterol biosensors essential for accurate mo...

Co3O4 is an attractive earth-abundant catalyst for CO oxidation, and its high catalytic activity has been attributed to Co cations surrounded by Co ions. Hence, the majority of efforts for enhancing the activity of Co3O4 have been focused on exposing more Co cations on the surface. Herein, we enhance the catalytic activity of Co3O4 by replacing the Co ions in the lattice with Cu. Polycrystallin...

1-(2-Pyridylazo)-2-naphthol (PAN) has been used for the simultaneous and individual determination of palladium and cobalt at trace levels. PAN complexes of palladium and cobalt at neutral pH form green-color neutral complexes, which are soluble in aqueous SDS micellar media. Under optimum conditions, calibration graphs for individual determinations by zero and first-derivative spectrophotometry...