Mostrar el registro sencillo del ítem
Photocatalytic Degradation of Methylene Blue under Visible Light Using TiO2 Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn)
dc.contributor.author | Sanguino, Alexander | |
dc.contributor.author | Diaz-Uribe, Carlos | |
dc.contributor.author | Duran, Freider | |
dc.contributor.author | Vallejo, William | |
dc.contributor.author | Guzman, Leidy | |
dc.contributor.author | Ruiz, Daniela | |
dc.contributor.author | Puello, Esneyder | |
dc.contributor.author | Quiñones, Cesar | |
dc.contributor.author | Schott, Eduardo | |
dc.contributor.author | Zarate, Ximena | |
dc.date.accessioned | 2024-04-10T06:40:01Z | |
dc.date.available | 2024-04-10T06:40:01Z | |
dc.date.issued | 2022 | |
dc.identifier | 10.3390/catal12101169 | |
dc.identifier.issn | 20734344 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12728/11050 | |
dc.description.abstract | In this work, tetra(4-carboxyphenyl)porphyrin (TCPP) and two Anderson-type polyoxomolybdates (containing Cu and Zn, respectively; CuPOM, ZnPOM) were synthesized and deposited on TiO2 thin films. The properties of the obtained materials were characterized through UV–vis spectroscopy, Fourier transform infrared spectroscopy (FT-IR), diffuse reflection spectroscopy, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The adsorption and photodegradation under the visible light irradiation of methylene blue (MB) were studied for TiO2, TCPP/TiO2, TCPP/CuPOM/TiO2 and TCPP/ZnPOM/TiO2 thin films in aqueous solution. The results of the diffuse reflectance showed two bands in the visible light spectrum for the TCPP/POM/TiO2 systems compared to unmodified TiO2 that does not show any bands in the same region of the spectrum. The TCPP/POM/TiO2 systems showed a higher removal of MB, with an adsorption rate near to 31% for the TCPP/CuPOM/TiO2 film compared to 9% adsorption on the TiO2 film. The kinetic results show that the pseudo-second order model was the best fitting model for the MB adsorption process onto fabricated materials. The photodegradation studies under visible light showed a better performance on TCPP/POM/TiO2 thin films, with an efficiency in the MB photodegradation of near 49% and 44% in aqueous solution for TCPP/CuPOM/TiO2 and TCPP/ZnPOM/TiO2, respectively. The reusability test indicated that the porphyrin films are moderately stable after the performed cycles. © 2022 by the authors. | es_ES |
dc.description.sponsorship | Anillos de Ciencia y Tecnología, (ACT210057); Universidad del Atlántico, UA; Fondo Nacional de Desarrollo Científico y Tecnológico, FONDECYT, (1201880) | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | MDPI | es_ES |
dc.subject | Anderson-type polyoxometalates | es_ES |
dc.subject | heterogeneous photocatalysis | es_ES |
dc.subject | porphyrin | es_ES |
dc.subject | thin films | es_ES |
dc.subject | TiO<sub>2</sub> | es_ES |
dc.title | Photocatalytic Degradation of Methylene Blue under Visible Light Using TiO2 Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn) | es_ES |
dc.type | Article | es_ES |