Efecto de la relación Al2O3/TiO2 en la degradación fotocatalítica de azul de metileno

Mónica Araceli Camacho González; Irina Lijanova Victorovna; Alberto Hernández Reyes; Carlos Alfredo Zamora Valencia; Nikté Yoliztli Martínez Palma; Brayan Javier Lorenzano Hernández

doi:10.29057/icbi.v13iEspecial4.16064

Autores/as

Mónica Araceli Camacho González Universidad Tecnológica de Tecámac https://orcid.org/0000-0001-5890-6313
Irina Lijanova Victorovna Centro Extremeño de iNvestigación https://orcid.org/0000-0003-1682-4509
Alberto Hernández Reyes Centro de Investigación e Innovación Tecnológica https://orcid.org/0000-0001-8773-8427
Carlos Alfredo Zamora Valencia Universidad Tecnológica de Tecámac https://orcid.org/0000-0003-3528-6144
Nikté Yoliztli Martínez Palma Universidad Tecnológica de Tecámac https://orcid.org/0000-0002-1313-6842
Brayan Javier Lorenzano Hernández Centro de Investigación y de Estudios Avanzados https://orcid.org/0000-0001-8790-4739

DOI:

https://doi.org/10.29057/icbi.v13iEspecial4.16064

Palabras clave:

Sol-Gel, Fotocatálisis heterogénea, Luz visible, Azul de metileno

Resumen

En el presente, se explora el efecto que tiene la relación molar Al2O3:TiO2 en las propiedades fisicoquímicas y ópticas del sistema (Al2O3)xTiO2 sintetizado por la técnica sol-gel con x=0, 0.5, 0.75 y 1.0, y en la eficiencia para degradar azul de metileno (AM) por fotocatálisis heterogénea. Por DRX se identificó la estructura rutilo para el TIO2 (x=0) y en el sistema (Al2O3)xTiO2, se identificaron las estructuras anatasa y α-alúmina para el TiO2 y Al2O3 respectivamente. La proporción x=0.75 mostró la mejor eficiencia de fotodegradación del AM, 43.5% en 6 h, al ser la única muestra que absorbe en el rango visible de 400 a 650 nm, y presenta baja aglomeración de partículas esféricas con distribución media de tamaño de 0.25 μm (~250 nm). La degradación del AM empleando TiO2, (Al2O3)0.5TiO2 y (Al2O3)TiO2 fue de 11.4%, 22.8% y 24.9% respectivamente.

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