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Photocatalytic activity of Bi$_{0.8}$La$_{0.2}$FeO$_{3-x}$K$_{0.5}$Na$_{0.5}$NbO$_3$ ceramic powders
ELVIRA-GIRALDO SEBASTIÁN GAONA J SONIA C F V RAIGOZA
Volume 46 Published: 16 February 2023 Article ID 0033
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https://www.ias.ac.in/article/fulltext/boms/046/0033 -
Keywords
Combustion ;visible-light irradiation ;photocatalysis ;rhodamine 6G. -
Abstract
(1-x)Bi$_{0.8}$La$_{0.2}$FeO$_{3-x}$K$_{0.5}$Na$_{0.5}$NbO$_3$) (x = 0.00; 0.05; 0.10, 1.00) or ‘BLFO-KNN’ was prepared by the combustion method, using KNO$_3$, NaNO$_3$, NH$_4$NbO(C$_2$O$_4$)$_2$(H$_2$O)$_2$, Bi(NO$_3$).5H$_2$O, La(CH$_3$COO)$_3$ and 5Fe(NO$_3$)$_3$.9H$_2$O as starting materials. The microstructural features of the synthesized nanoparticles were characterized by X-ray powder diffraction and Raman spectroscopy. Rietveld refinement showed coexistence of orthorhombic-monoclinic phases for the powders obtained with x = 0.05 and 0.10. The photocatalytic activity of the BLFO-KNN, at different pH values, was investigated via degradation of rhodamine 6G (Rh6G) dye in a photoreactor equipped with commercial lamps that simulated sunlight. The results showed that BLFO can absorb visible light, whereas KNN absorbs in the ultraviolet range. There is a strong effect of the pH on the photocatalytic activity, with the highest activity for the Bi$_{0.8}$La$_{0.2}$FeO$_3$ system at pH = 2 (${\sim}$90% degradation efficiency for x = 0.0).
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Author Affiliations
ELVIRA-GIRALDO SEBASTIÁN GAONA J SONIA1 C F V RAIGOZA
- Grupo de Ciencia y Tecnología de Materiales Cerámicos (CYTEMAC), Universidad del Cauca, Calle 5 No 4-70, Sede Tulcan, Popayán 190002, Colombia
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Dates
- Published
- 16 February 2023
- Manuscript received
- 28 April 2022
- Accepted
- 12 October 2022
- Final version published online
- 16 February 2023
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Volume 46, 2023
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