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Nanostructured Ni0.9Co2.1O4 Spinel Oxide: Electrochemical, Spectroscopic and morphological Investigation

Nickel cobalt oxide Ni0.9Co2.1O4 powder were prepared by sol-gel via propionic acid technique from mixed aqueous solutions of hydrated cobalt nitrate (Co(NO3)2·6H2O) and hydrated nickel nitrate (Ni(NO3)2·6H2O) as sources of cobalt and nickel respectively. The system evolves toward the formation of the spinel phase, with further temperature thermal treatment at 350 °C. The structural, morphological, optical and electrochemical properties of the synthesized products were characterized through several techniques including ultraviolet-visible spectroscopy (UV-Vis), Raman spectroscopy (RS), scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). UV-visible absorbance spectrum have indicated that the oxide have higher absorption of ultraviolet light compare to visible light. Raman spectroscopy confirm XRD data through no apparition of any impurity peak. The SEM image reveals a porous structure with nanoplaquettes coexisting with agglomerates of spherical grain size.

Auteur(s) : Mamadou Guèye and Papa Charles Harris Mandiamy, Makhtar Guène
Pages : 816 - 823
Année de publication : 2017
Revue : : International Journal of Advanced Research
N° de volume : 5
Type : Article
Mise en ligne par : GUENE Makhtar