Browsing by Author "Castillo Gaviria, Karol Gabriela"
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Item Sulfuro de Cadmio como material bactericida contra Escherichia coli y Staphylococcus aureus(Universidad Santiago de Cali, 2022) Castillo Gaviria, Karol Gabriela; Ávila Torres, Yenny Patricia; Ríos Acevedo, John JairoIn this preliminary research project, the antibacterial activity of the semiconductor Cadmium Sulfide (CdS), obtained from laboratory residues from conventional practices of analytical chemistry and inorganic chemistry, was evaluated. This compound has structural and electronic characteristics that allow its photoactivation under visible radiation at 480 nm, and therefore the generation of reactive oxygen species in the presence of oxygen and aqueous solution. The material was characterized by solid state UV-Vis spectroscopy and scanning electron microscopy (SEM). Due to its ability to interact with radiation, photoactivated CdS, has successfully degraded some organic molecules such as fluoroquinolones in previous work. However, within applications as an oxidant, its use as a disinfectant using the photocatalysis process had not been explored. Reason for which, in this project it was found that this residue can be used against gram positive and gram negative microorganisms, showing that the attack is selective. This mechanism was suggested by using selective scavengers of reactive oxygen species (super-oxo anion radical, hydroxyl radical and photoholes) generated in this environment and under laboratory conditions