Vigilancia Tecnológica

Bacteria-associated illnesses have grown in recent years as these bacteria have gained treatment resistance. Nanoparticles have shown to be an option for common medical operations due to their excellent antibacterial ability related with their nanometric size. Casting with varied concentrations of (CeO2/SiC) nanoparticles (0, 2, 4, 6, and 8) wt% was used to create the (PVA/CeO2/SiC) nanocomposites. The morphological, structural, optical, and antibacterial characteristics of (PVA/CeO2/SiC) NCs were examined in this work. The results of field emission scanning electron microscopy (FE-SEM) examinations show that the surface morphology is sufficiently homogenous and distributed. The pictures taken with an optical microscope show that the nanoparticles dispersion was uniform and created a strong network throughout the polymer matrix. Utilizing wavelengths ranging from 200 to 800 nm, the absorption spectra are recorded. We have calculated the absorption coefficient, optical conductivity, and optical constants such the dielectric constant (real and imaginary portions), refractive index, and attenuation coefficient. According to the findings, the concentration of (CeO2/SiC) NPs and the optical constants have a proportionate connection, meaning that an increase in (CeO2/SiC) NPs concentration causes an increase in optical constants, while the transmission decreases. The optical energy gap for permissible indirect transitions drops from 4.2 eV to 2.9 eV and for impermissible indirect transitions lowers from 3.4 eV to 1.4 eV as the concentration of (CeO2/SiC) NPs increases. These findings are crucial for using (PVA/CeO2/SiC) NCs in many different areas, including optoelectronics and photonics. Lastly, the (PVA/CeO2/SiC) NCs were tested for their antibacterial activity. Antibacterial activity against Staphylococcus aureus and Escherichia coli was observed to be enhanced with increasing CeO2/SiC NPs to PVA ratios. At a concentrations of (4, 6 and 8) %, the inhibition zone was (18, 21, 23) mm and (16, 20, 22) mm, for Staphylococcus aureus and Escherichia coli bacteria respectively. Finally, the findings suggested that the (PVA/CeO2/SiC) NCs might be regarded as promising materials for optoelectronics nanodevices and medicinal applications.