Título
Hydrogen production by tailoring the brookite and Cu2O ratio of sol-gel Cu-TiO2 photocatalysts
Autor
MARIANA HINOJOSA REYES
ROBERTO CAMPOSECO SOLIS
Rodolfo Zanella
VICENTE RODRIGUEZ GONZALEZ
Nivel de Acceso
En Embargo
Identificador alterno
doi: https://doi.org/10.1016/j.chemosphere.2017.06.066
Materias
Resumen o descripción
"Cu-TiO2 photocatalysts were prepared by the sol-gel method. Copper loadings from, 1.0 to 5.0 wt % were used. The materials were annealed at different temperatures (from 400 to 600 °C) to study the formation of brookite and copper ionic species. The photocatalysts were characterized by X-ray diffraction, UV–vis, Raman and XPS spectroscopies, H2-temperature programmed reduction (TPR), N2 physisorption, and SEM–EDS to quantify the actual copper loadings and characterize morphology. The photocatalysts were evaluated during the hydrogen photocatalytic production using an ethanolic solution (50% v/v) under UV and visible radiation. The best hydrogen production was performed by Ti-Cu 1.0 with an overall hydrogen production that was five times higher than that obtained with photolysis. This sample had an optimal thermal treatment at 500 °C, and at this temperature, the Cu2O and brookite/anatase ratio boosted the photocatalytic production of hydrogen. In addition, a deactivation test was carried out for the most active sample (TiO2-Cu 1.0), showing unchanged H2 production for three cycles with negligible Cu lixiviation. The activity of hydrogen-through-copper production reported in this research work is comparable with the one featured by noble metals and that reported in the literature for doped TiO2 materials."
Editor
Elsevier
Fecha de publicación
2017
Tipo de publicación
Artículo
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application/pdf
Sugerencia de citación
Mariana Hinojosa-Reyes, Roberto Camposeco-Solís, Rodolfo Zanella, Vicente Rodríguez González, Hydrogen production by tailoring the brookite and Cu2O ratio of sol-gel Cu-TiO2 photocatalysts, Chemosphere, Volume 184, 2017, Pages 992-1002.
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