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Título

Stainless steel wire mesh-supported ZnO for the catalytic photodegradation of methylene blue under ultraviolet irradiation

AutorVu, Thi Tan ; Río, Laura del ; Valdés-Solís Iglesias, Teresa ; Marbán Calzón, Gregorio
Palabras clavePhotocatalysis
Catalytic activity
ZnO
Stainless steel mesh
Deactivation
Fecha de publicacióndic-2012
EditorElsevier
CitaciónJournal of Hazardous Materials 246-247: 126-134 (2013)
ResumenThe aim of this study was to assess the activity of catalysts formed by nanostructured zinc oxide supported on stainless steel wire mesh for the photocatalytic degradation of methylene blue under UV irradiation. Catalysts prepared by means of different low temperature synthesis methods, as described in a previous work (Vu et al., Mater. Res. Bull. 47 (2012) 1577–1586) were tested. A new activity parameter was introduced in order to compare the catalytic activity of the different catalysts. The best catalyst showed a catalytic activity higher than that of the reference material TiO2 P25 (Degussa-Evonik). This high activity is attributed to a higher quantum yield derived from the small particle length of the ZnO deposited on the wire mesh. The photocatalytic degradation kinetics of methylene blue fitted a potential model with n orders ranging from 0.5 to 6.9. Reaction orders over 1 were attributed to catalyst deactivation during the reaction resulting from the photocorrosion of ZnO.
Versión del editorhttp://dx.doi.org/10.1016/j.jhazmat.2012.12.009
URIhttp://hdl.handle.net/10261/111013
DOI10.1016/j.jhazmat.2012.12.009
ISSN0304-3894
E-ISSN1873-3336
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