In situ formation of CuxO/ZnO photocatalysts for efficient simultaneous oxidation of As (III) and adsorption of As (V): Effect of Cu loading

Título traducido de la contribución: Formación in situ de fotocatalizadores CuxO/ZnO para oxidación simultánea eficiente de As (III) y adsorción de As (V): efecto de la carga de Cu

Angel Rodrigo Salazar Martinez (Co-autor), Miguel A. Valenzuela (Co-autor), Elim Albiter, José Manuel Barrera‑Andrade, José A. Luna‑Santiago (Co-autor), Aura Sofía Merlano Manotas (Co-autor), Elizabeth Rojas‑García (Co-autor)

Producción científica: Contribución a una revistaArtículo en revista científica indexadarevisión exhaustiva

Resumen

The introduction of Cu ions onto ZnO leads to alterations in the electrical, optical, and magnetic characteristics of ZnO. These transformations, in turn, result in heightened photocatalytic activity and enhanced stability when employed in the degradation of both organic and inorganic pollutants. Here, a novel photocatalytic-adsorbent system is developed using zinc oxide (ZnO) nanostructures modified with Cu (II) ions in an aqueous solution containing 40 mg/L of As (III). The system utilizes UV-A light (365 nm) as the irradiation source, and the weight percentage of Cu (II) in the composite varies from 0 to 20%. The experimental results reveal significant adsorption of As (III), ranging from 20 to 50%, depending on the solution's Cu (II) content. Remarkably, the ZnO10%Cu composite exhibits the highest photocatalytic activity, achieving 40% adsorption and complete oxidation of As (III) within 25 min of irradiation. Characterization of the composite after the photocatalytic treatment reveals the effective adsorption of As (V) within its structure. Furthermore, no traces of Cu (II) ions are detected in the solution after the reaction, indicating their successful adsorption onto the ZnO surface as Cu (I) and Cu (II) ions. This research marks a significant advancement in harnessing innovative materials for efficient arsenic removal, offering promising insights into the development of novel photocatalytic-adsorbent systems.
Título traducido de la contribuciónFormación in situ de fotocatalizadores CuxO/ZnO para oxidación simultánea eficiente de As (III) y adsorción de As (V): efecto de la carga de Cu
Idioma originalInglés
Número de páginas9
PublicaciónEnvironmental Science and Pollution Research
Fecha en línea anticipada13 dic. 2023
EstadoPublicada - 13 dic. 2023

Palabras clave

  • CuxO/ZnO · As (III)
  • photocatalysis · As (V)
  • adsorption
  • in-situ
  • UV light

Tipos de Productos Minciencias

  • Artículos de investigación con calidad A1 / Q1

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