Producción CyT
Artículo
Autoría
ONAGA MEDINA, FLORENCIA MICAELA
;
Peralta, Marcos E.
;
Diblasi, Lorena
;
Avena, Marcelo J.
;
Parlo, Eugenia M.
Fecha
2025
Editorial y Lugar de Edición
El Sevier
Revista
Next Materials,
vol. 8
- ISSN 2949-8228
El Sevier
El Sevier
ISSN
2949-8228
Resumen
Información suministrada por el agente en
SIGEVA
In this work, an easy method for the preparation of reduced graphene oxide-magnetite nanocomposite was developed via the reduction of graphene oxide by ferrous ions and in-situ synthesis of magnetite nanoparticles on graphene sheets. The resulting magnetic nanocomposite (rGO_m) was tested in the abatement of caffeine, serving as a model for emerging pollutants. The reduction of caffeine concentration was accomplished because of the dual-function of rGO_m both as adsorbent and photo-Fenton catal...
In this work, an easy method for the preparation of reduced graphene oxide-magnetite nanocomposite was developed via the reduction of graphene oxide by ferrous ions and in-situ synthesis of magnetite nanoparticles on graphene sheets. The resulting magnetic nanocomposite (rGO_m) was tested in the abatement of caffeine, serving as a model for emerging pollutants. The reduction of caffeine concentration was accomplished because of the dual-function of rGO_m both as adsorbent and photo-Fenton catalyst. At pH 3, rGO_m achieved a 99 % degra dation of caffeine in 90 min and was able to be reused in 4 consecutive cycles remaining 80 % of degradation capacity. At mild acidic conditions, the combined effect of adsorption and photo-Fenton reaction allows rGO_m to reach an 85 % decrease of initial caffeine concentration in 2 h, under simulated solar light radiation. This abatement capacity is noteworthy for high initial caffeine concentration (30 mg L-1) and simulated solar light compared to similar nanocomposites tested under more favorable conditions, such us, low initial concentration and/or UV-light irradiation. Furthermore, rGO_m serving as adsorbent for caffeine attained a maximum uptake of 56.5 mg g at pH 5 and was able to be reused for 6 consecutive cycles without loss of adsorption capacity. Through its dual function this nanocomposite achieved enhanced adsorption and oxidative degradation of caffeine, making it a competitive option for removing emerging pollutants from wastewater under simulated solar light.
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Palabras Clave
AdsorptionGraphene oxidePhoto-FentonNanoadsorbent