Photocatalytic Degradation of Methylene Blue under Visible Light Using TiO<sub>2</sub> Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn)

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dc.contributor.authorSanguino, Alexander
dc.contributor.authorDiaz-Uribe, Carlos
dc.contributor.authorDuran, Freider
dc.contributor.authorVallejo, William
dc.contributor.authorGuzman, Leidy
dc.contributor.authorRuiz, Daniela
dc.contributor.authorPuello, Esneyder
dc.contributor.authorQuinones, Cesar
dc.contributor.authorSchott, Eduardo
dc.contributor.authorZarate, Ximena
dc.date.accessioned2025-01-20T21:01:44Z
dc.date.available2025-01-20T21:01:44Z
dc.date.issued2022
dc.description.abstractIn 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.
dc.description.funderUniversidad del Atlantico
dc.fuente.origenWOS
dc.identifier.doi10.3390/catal12101169
dc.identifier.eissn2073-4344
dc.identifier.urihttps://doi.org/10.3390/catal12101169
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92942
dc.identifier.wosidWOS:000872657500001
dc.issue.numero10
dc.language.isoen
dc.revistaCatalysts
dc.rightsacceso restringido
dc.subjectheterogeneous photocatalysis
dc.subjectTiO2
dc.subjectthin films
dc.subjectAnderson-type polyoxometalates
dc.subjectporphyrin
dc.titlePhotocatalytic Degradation of Methylene Blue under Visible Light Using TiO<sub>2</sub> Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn)
dc.typeartículo
dc.volumen12
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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