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Artículo

Improved stability in SBA-15 mesoporous materials as catalysts for photo-degradation processes

Elías, Verónica RitaIcon ; Ferrero, Gabriel OrlandoIcon ; Oliveira, Rafael GustavoIcon ; Eimer, Griselda AlejandraIcon
Fecha de publicación: 09/2016
Editorial: Elsevier Science
Revista: Microporous and Mesoporous Materials
ISSN: 1387-1811
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

SBA-15 materials were modified with Cr, Ni and Fe and characterized by ICP, SAXS, XRD, N2 adsorption, TPR and UV–Vis DRS. Their photo-catalytic activity was evaluated for the degradation of Acid Orange 7 (AO7) in aqueous suspensions irradiated by artificial UV–Vis light. The results showed that the Cr-modified catalyst exhibited the highest activity. The presence of Cr6+ highly dispersed on the internal surface of the SBA-15 structure would be responsible for this observed behavior. Then, when TiO2 was loaded on this solid, the photo-activity was increased due to a heterojunction effect between the two metals. Moreover, the TiO2 cover resulted in the Cr species protection leading to a notable decrease of the Cr leaching into the reaction medium. In addition, comparing with the already reported results for modified MCM-41 catalysts, the solid synthesized here allowed achieving the solution biodegradability in shorter irradiation periods and could be re-used even after four cycles without loss of activity. Thus, the high performance of this material leads to make it a very promising photo-catalyst for pre-treatment of recalcitrant contaminants present in aqueous effluents.
Palabras clave: Nanostructures , Stability , Metallic Species , Catalytic Properties
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/31978
DOI: http://dx.doi.org/10.1016/j.micromeso.2016.09.001
URL: http://www.sciencedirect.com/science/article/pii/S1387181116303821
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Articulos(CITEQ)
Articulos de CENTRO DE INVESTIGACION Y TECNOLOGIA QUIMICA
Citación
Elías, Verónica Rita; Ferrero, Gabriel Orlando; Oliveira, Rafael Gustavo; Eimer, Griselda Alejandra; Improved stability in SBA-15 mesoporous materials as catalysts for photo-degradation processes; Elsevier Science; Microporous and Mesoporous Materials; 236; 9-2016; 218-227
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