Artículo
Novel (NH4)4[NiMo6O24H6]·5H2O – TiO2 composite system: Photo-oxidation of toluene under UV and sunlight-type illumination
Muñoz Batista, Mario J.; Bertolini, Guillermo Ramon
; Cabello, Carmen Ines; Luque, Rafael; Rodríguez Castellón, Enrique; Kubacka, Anna; Fernández García, Marcos
Fecha de publicación:
20/12/2018
Editorial:
Elsevier Science
Revista:
Applied Catalysis B: Environmental
ISSN:
0926-3373
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A series of composite materials based on titania and growing quantities of the (NH4)4[NiMo6O24H6]·5H2O heteropolyacid (NiMo6 HPA) was tested in the gas-phase toluene photo-oxidation reaction. Materials were characterized with the help of chemical analysis, X-ray diffraction, porosimetry, electron transmission and scanning microscopies, as well as X-ray photoelectron and UV–visible diffuse-reflectance spectroscopies. Photo-activity performance was assessed under UV and sunlight-type illumination conditions through the calculation of the true quantum efficiency to measure activity as well as the analysis of the selectivity of the reaction. The composite system having a 3 wt. % of the NiMo6 component presents improved performance with respect to well defined titania references (parent nanosized anatase or P25) under all illumination conditions tested. The characterization of the solids indicates that the NiMo6 component supported on titania suffers a significant modification of its physico-chemical properties as a function of the loading of the composite system. Such modification appears as a consequence of the interface interaction between the components of the composite system. An electron paramagnetic resonance study of the radical species formed under illumination shows that charge handling through the NiMo6 – TiO2 interface controls the photo-catalytic properties.
Palabras clave:
Anatase
,
Nimo Anderson
,
Quantum Efficiency
,
Sunlight
,
Toluene
,
Uv
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Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Muñoz Batista, Mario J.; Bertolini, Guillermo Ramon; Cabello, Carmen Ines; Luque, Rafael; Rodríguez Castellón, Enrique; et al.; Novel (NH4)4[NiMo6O24H6]·5H2O – TiO2 composite system: Photo-oxidation of toluene under UV and sunlight-type illumination; Elsevier Science; Applied Catalysis B: Environmental; 238; 20-12-2018; 381-392
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