RT info:eu-repo/semantics/article
T1 Sunlight-driven AO7 degradation with perovskites (La,Ba)(Fe,Ti)O3 as heterogeneous photocatalysts
A1 Rodrigues, Ana Sofia
A1 Ciríaco, Lurdes
A1 Pacheco, Maria José
A1 Fernandes, Annabel
A1 Mogo, Sandra
A1 Lopes, Ana
K1 Perovskite
K1 Photocatalysis
K1 Solar light
K1 Polymerization
K1 AO7
K1 Ceramic method
AB Perovskites of the (La,Ba)(Fe,Ti)O3 family were prepared, characterized, and utilized as heterogeneous photocatalysts, activated by natural sunlight, for environmental remediation of Acid Orange 7 (AO7) aqueous solutions. Catalysts were prepared by the ceramic (CM) and the complex polymerization (CP) methods and characterized by XRD, SEM, EDS, and band gap energy. It was found that catalytic properties depend on the synthesis method and annealing conditions. In the photocatalytic assays with sunlight, different AO7 initial concentrations and perovskite amounts were tested. During photocatalytic assays, AO7 and degradation products concentrations were followed by HPLC. Only photocatalysis with BaFeO3-CM and BaTiO3-CP presented AO7 removals higher than that observed for photolysis. However, photolysis leads to the formation of almost exclusively amino-naphthol and sulfanilic acid, whereas some of the perovskites utilized form less-toxic compounds as degradation products, such as carboxylic acids (CA). Partial substitution of Ba by La in BaTiO3-CM does not produce any change in the photocatalytic properties, but the replacement of Ti by Fe in the La0.1Ba0.9TiO3 leads to reduced AO7 removal rate, but with the formation of CAs. The best AO7 removal (92%) was obtained with BaFeO3-CM (750 mg L−1), after 4 h of photocatalytic degradation with solar radiation.
PB MDPI
SN 2079-4991
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59102
UL https://uvadoc.uva.es/handle/10324/59102
LA eng
NO Nanomaterials, 2021, Vol. 11, Nº. 11, 3142
NO Producción Científica
DS UVaDOC
RD 23-nov-2024