One Pot Synthesis, characterization, morphology and optical profilometry properties of La-doped and La–Ag-doped cobalt oxide nanoparticles

In our work, the fabrication, optical investigation along with the characterization of pure, Lanthanum (La)-doped and Ag-La-doped cobalt oxide NPs was performed. The designed nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (TG-DTG) analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence (PL). Optical investigation has been done using optical profilometry. The outcome of FT-IR spectral bands/peaks of the synthesized NPs evidently imply the occurrence of Co–oxygen bond, a characteristic bonding in metal oxides. The FE-SEM analysis of the metal oxide NPs shows nano wall-like structures. It has been observed that the crystallite dimension of Lanthanum-doped cobalt oxide increases in size as the concentration of La3+ doping increases as shown in HR-TEM images and XRD data. The PL report showed that Lanthanum-doped and Ag–La-doped Co3O4 are the pivotal luminescent components that can efficaciously enhance the luminescence capacity of the La based-doped as well as Ag–La doped Co3O4. The exterior roughness and the topographical pictures of the La–Ag-doped Co3O4 nanoparticles are examined using optical profilometry method.