Artículos de revistas
Synthesis and characterization of a novel tungstosilicic acid immobilized on zeolites catalyst for the photodegradation of methyl orange
Fecha
2016-07Registro en:
Pierella, Liliana Beatriz; Pizzio, Luis Rene; Renzini, Maria Soledad; Lerici, Laura Carolina; Leal Marchena, Candelaria; Synthesis and characterization of a novel tungstosilicic acid immobilized on zeolites catalyst for the photodegradation of methyl orange; Elsevier Science; Applied Catalysis B: Environmental; 188; 7-2016; 23-30
0926-3373
CONICET Digital
CONICET
Autor
Leal Marchena, Candelaria
Lerici, Laura Carolina
Renzini, Maria Soledad
Pizzio, Luis Rene
Pierella, Liliana Beatriz
Resumen
Materials based on tungstosilicic acid (TSA) immobilized on zeolites (NH4Y and NH4ZSM5) were prepared by wet impregnation of the zeolite matrix with TSA aqueous solutions. The concentration was varied in order to obtain TSA contents of 5%, 10%, 20%, and 30% w/w in the solid. Catalysts were further characterized by N2 adsorption–desorption isotherms, FT-IR, XRD, DRS-UV–vis and SEM techniques. The resulting materials were evaluated in the photodecomposition of azo dye methyl orange. The results revealed that the materials present suitable properties to be used as catalysts in the photocatalytic treatment of wastewater containing dyes, and the photodegradation follows a pseudo-first-order kinetics. Reaction parameters such as TSA content, catalysts mass, reuses and pH, were evaluated.