Evaluación del efecto de inactivación fotocatalítica de la mezcla TiO2/CuOx sobre E. coli en presencia de luz visible mediante un método de validación

In this study the photocatalytic inactivation method was performed using the TiO2 / CuOx mixture on the E. coli bacteria in the presence of visible light, with reference to the results of the preliminary in the research group of Photovoltaic Materials, (98,13% to 99.99% in the elimination of the microorganism). Modification of the TiO2 with CuSO4, by means of the wet impregnation method, varying the temperature in the activation processes and the deposition of the mixture, with the concentration of the precursor (1.3% P/P). The spin coating films were prepared by depositing the mixture on a flat substrate. For the functionality test of the films, methylene blue was used, where the degradation capacity in the visible spectrum was evidenced. The morphological and structural characterization of the films is performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The efficacy of the photocatalytic mixture in inactivation of the Escherichia coli microorganism was evaluated using an inoculated sample of 1.5x10^8 CFU / mL using a photoreactor, in a time of 9 hours. The coating of the microorganism was performed using a plate count technique, verifying that using the TiO2/CuOx blend at the calcination temperature of 550 °C, the inactivation of E. coli is 99.99 %.

• Fecha de publicación: 2017
• Institución: Universidad de América
• Repositorio: Lumieres
• Idioma: spa
• OAI Identifier: oai:repository.uamerica.edu.co:20.500.11839/6563
• Acceso en línea: https://hdl.handle.net/20.500.11839/6563
• Palabra clave: Método de inactivación fotocatalítico; Materiales Fotoactivos; Método de impregnación húmeda; Inactivation method photocatalytic; Photoactive materials; Wet impregnation method; Tesis y disertaciones académicas
• License: Atribución – No comercial – Sin Derivar