A photochemical route in the synthesis and characterization of La2Ti2O7 and La2Ti2O7/AgO films and its evaluation in Congo red degradation and as antibacterial control to Staphylococcus aureus

Luis Fernández, Felipe Bustos, Diana Correa, Mathias Seguel, Cristian Suarez, Claudia Caro, Patricio Leyton, Gerardo Cabello-Guzmán

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

Resumen

In this article, we propose a simple photochemical method to synthesize pure La2Ti2O7 films and La2Ti2O7 films doped with silver at 1.0, 3.0, and 5.0 mol%. After annealing the photo-deposited films at 900 °C, XRD, SEM, and XPS analyses showed the formation of a monoclinic La2Ti2O7 phase and the presence of Ag and AgO in doped samples. Photocatalytic tests for Congo red degradation demonstrated that pure La2Ti2O7 achieved 25.4% degradation, while doped samples reached a maximum of 92.7% degradation. Moreover, increasing silver doping on La2Ti2O7 films significantly reduced the growth of Staphylococcus aureus, indicating potential antibacterial properties. The enhanced photoactivity was attributed to the formation of a type I heterojunction between La2Ti2O7 and AgO, and a degradation mechanism was proposed based on Congo red degradation.

Idioma originalInglés
Páginas (desde-hasta)107580-107597
Número de páginas18
PublicaciónEnvironmental Science and Pollution Research
Volumen30
N.º49
DOI
EstadoPublicada - oct. 2023

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