Synthesis of colloidal suspensions of CoOx/C nanomaterials using laser ablation of solids in liquids
DOI:
https://doi.org/10.31349/RevMexFis.72.041004Keywords:
Laser ablation, Photoluminescence, Carbon nanostructures, Cobalt oxides, CoOx/C nanomaterialsAbstract
In this work, colloidal suspensions of CoOx/ nanomaterials were synthesized using laser ablation of solids in liquids. In the first stage, experiments were carried out using a cobalt target and deionized water as the liquid medium in order to establish the conditions for the synthesis of the nanomaterials. Subsequently, the cobalt target was irradiated in two liquid media containing carbon nanomaterials: a colloidal suspension of carbon nanoparticles (CNPs) and another of graphene oxide nanosheets (GONs). The effect of the liquid medium was studied as an important parameter, which determines the composition and structure of the final products. The resulting CoOx/C nanomaterials were characterized morphologically and structurally using infrared spectroscopy, Raman spectroscopy, and transmission electron microscopy. In addition, the optical properties of the colloidal suspensions were evaluated using fluorescence spectroscopy. The results show that ablation in deionized water produces Co3O4 nanoparticles with an average diameter of 10.43 nm, while ablation in colloidal suspensions of carbon nanomaterials led to the formation of two types of structures: carbon-coated CoOx nanoparticles and spherical CoOx nanoparticles embedded in a carbon matrix. These cobalt oxide and carbon-based nanomaterials have broad potential in biomedical applications and energy storage devices.
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