Analysis of the photocatalytic activity of La0.9Sr0.1Fe0.8Co0.2O3±d perovskite as a catalyst in the degradation of RB-5 dye
Por:
de la Huerta-Hernández G.E., Chávez-Carvayar J., Rodríguez-Flores T., Castro-Cisneros I., Reyes-Montero A., Hernández-Pérez I.
Publicada:
1 ene 2023
Ahead of Print:
1 sep 2023
Resumen:
The photocatalytic efficiency of some semiconductors depends mainly on their morphological, optical, and structural properties, which can be modified by varying the calcination temperature. In order to evaluate how these properties change, as a function of temperature in a AA’BB’O3 perovskite material, La0.9Sr0.1Fe0.8Co0.2O3±d (LSFC) was synthesized by the Pechini method and calcined at different temperatures (600 °C, 700 °C, 800 °C, and 900 °C). All the samples were characterized structurally, morphologically, and optically by XRD, SEM, and UV-Vis spectroscopy. Additionally, specific surface area and pore size distribution were calculated by BET and BHJ methods. LSFC was evaluated as photocatalyst material, estimating the degradation of reactive black 5 (RB5), employing as irradiation source UV light and sunlight. The obtained results display a clear tendency between the photoactivity and the heat treatment: degradation percentage decreases as the calcination temperature increases mainly due to the crystal and grain size and, furthermore, loss of porosity and the decrease in surface area, affecting the photocatalytic activity (98%, 95%, 74%, and 50% degradation, respectively). All the ceramic samples follow a pseudo-first-order reaction. Graphical Abstract: [Figure not available: see fulltext.] © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Filiaciones:
Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 180, Col. Reynosa Tamaulipas, Mexico City, 02200, Mexico
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., Mexico City, C.P. 04510, Mexico
Facultad de Ingeniería, Universidad Autónoma del Carmen, Av. Central s/n esq. Con Fracc. Mundo Maya, Ciudad del Carmen, C.P. 24115, Mexico
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