Investigation on structural, optical and electrical nature of pure and Cr-incorporated cobalt oxide nanoparticles prepared via co-precipitation method for photocatalytic activity of methylene blue dye

Ag doped Co3O4 nanoparticles for high-performance supercapacitor application

“…UmaSudharshini et al Stated that the presence of two bands assigned to the vibrations of Co 3+ and Co 2+ in an octahedral and tetrahedral site, respectively, thereby confirming the formation of the spinel structure Co 3 O 4 [ 59 ]. The FTIR spectra observed in this study are in a good agreement with previous reported results [ 59 , 78 , 79 ].

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Enhancing pseudocapacitive properties of cobalt oxide hierarchical nanostructures via iron doping

“…Finally, the characteristic peaks at 620 cm −1 and 570 cm −1 are connected to the stretching vibrations of the metal-oxygen(M–O) bond, which supports the spinel structure of Co 3 O 4 NPs [ 26 ]. Moreover, the FTIR spectra investigation are well matching with others findings [ 63 , 70 ]. According to FTIR result the peak intensity raised with increasing iron doping levels, which also improved the crystallinity of the NPs.…”

Engineering Co3O4/MnO2 nanocomposite materials for oxygen reduction electrocatalysis

“…The FTIR spectrum of Co 3 O 4 nanoparticles shows that the broad bands around 3440 cm À1 is corresponding to stretching vibration of the O-H group of molecular water and the band at 1632 cm À1 is matched to the bending mode of water molecules [59]. The bands at 1387 and 1074 cm À1 are ascribed to the vibration of the surface bidentate carbonate from gaseous CO 2 which interacts with the lattice oxygen present in Co 3 O 4 [60]. However, after annealing treatment, for the as-prepared nanoparticles a very strong peak at 655 cm À1 for characteristic of spinel (αhν…”