Artículo
Heterogeneous photo-Fenton process mediated by Sn-substituted goethites with altered OH-surface density
Larralde, Ana Laura
; Onna, Diego Ariel
; Fuentes Flores, Keyla Mayerlin
; Sileo, Elsa Ester; Hojamberdiev, Mirabbos; Aldabe, Sara Alfonsina
Fecha de publicación:
08/2019
Editorial:
Elsevier Science SA
Revista:
Journal of Photochemistry and Photobiology A: Chemistry
ISSN:
1010-6030
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Heterogeneous photo-Fenton process using several pure- and Sn-incorporated goethites was investigated for the decolourisation of methyl orange (MO). The used goethites presented a partial Sn(IV)-for-Fe(III)substitution. Among other properties variations, this partial replacement provoked changes in the OH-surface density (OSD)of the oxo(hydr)oxide. The effect of Sn-for-Fe substitution on the MO decolourisation was investigated by analysing several processes that might occur when combining H2O2, UV–vis irradiation and the iron oxides, with the dye. The best performance was achieved when a slight substitution of Sn-for-Fe was used, indicating that tin contributes indirectly to the decolourisation by increasing the OSD and assisting the reduction of Fe(III)→ Fe(II)through an intermediate between tin and H2O2 (SnOOH). The proposed mechanism for the MO decolourisation using the Sn-substituted goethite involves an indirect pathway not previously reported for the photo-Fenton process.
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Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Larralde, Ana Laura; Onna, Diego Ariel; Fuentes Flores, Keyla Mayerlin; Sileo, Elsa Ester; Hojamberdiev, Mirabbos; et al.; Heterogeneous photo-Fenton process mediated by Sn-substituted goethites with altered OH-surface density; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 381; 8-2019; 1-29
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