Performance of a C-containing Cu-based photocatalyst for the degradation of tartrazine: Comparison of performance in a slurry and CPC photoreactor under artificial and natural solar light
Autor
Muñoz-Flores, Paula
Poon, Po S.
Ania, Conchi
Matos, Juan
Resumen
A carbon-containing Cu-based material (Cu@C) was used as photocatalyst for the degradation of a commonly food-industry azo-dye (tartrazine, also called Y5), under solar light at laboratory and pilot scale photoreactors. Important performance parameters such as dark adsorption capacity, catalyst́s loading and initial concentration of the dye were first optimized in a slurry photoreactor at laboratory scale under artificial solar light following the kinetics of degradation of the dye. Afterwards, the photocatalytic activity was investigated at pilot scale in a compound parabolic collector (CPC) photoreactor operating for 10 h of irradiation. The degradation of tartrazine is among the highest values reported for alternative metal oxide semiconductors, in both photoreactor configurations. Catalytic data revealed a 3 times faster degradation kinetics of tartrazine in the CPC photoreactor under natural solar light than in the slurry reactor under artificial solar light. This behavior indicates that a moderate photon flux in the CPC is more adequate to operate with the prepared photocatalyst, as it minimizes the recombination of charge carriers in the catalyst. This is important, since most of the photocatalytic tests designed to evaluate the activity of novel materials are frequently carried out under simulated solar light and disregard the impact of photon flux in outdoor conditions.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Article
Photocatalytic performance of carbon-containing cumo-based catalysts under sunlight illumination (2022)
Muñoz-Flores, Paula; Poon, Po S.; Sepúlveda, Catherine Mauricio A.; Ania, Conchi; Matos, Juan (MDPI, 2022-01)Carbon-doped nanostructured CuMo-based photocatalysts were prepared by solvother-mal synthesis. Two thermal treatments—oxidative and inert atmosphere—were used for the synthesis of the catalysts, and the influence of ... -
Article
Layered Nanocomposite 2D-TiO2 with Cu2O Nanoparticles as an Efficient Photocatalyst for 4-Chlorophenol Degradation and Hydrogen Evolution (2020)
Alegría, Matías; Aliaga, Juan; Ballesteros, Luis; Sotomayor-Torres, Clivia; González, Guillermo; Benavente, Eglantina (Springer, 2020-09-01)New composites formed by layered hybrid TiO2(stearic acid) (LHTiO2) and, Cu2O nanoparticles were studied as photocatalysts that extend the response range to light visible for the evolution of hydrogen and the degradation ... -
Article
Photocatalytic Degradation of Methylene Blue under Visible Light Using TiO2 Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn) (2024)
Sanguino, Alexander; Diaz-Uribe, Carlos; Duran, Freider; Vallejo, William; Guzman, Leidy; Ruiz, Daniela; Puello, Esneyder; Quiñones, Cesar; Schott, Eduardo; Zarate, Ximena (MDPI, 2022)In this work, tetra(4-carboxyphenyl)porphyrin (TCPP) and two Anderson-type polyoxomolybdates (containing Cu and Zn, respectively; CuPOM, ZnPOM) were synthesized and deposited on TiO2 thin films. The properties of the ...