Obtención del composito TiO2 – Fe2O3 por mecanosíntesis y su uso en la fotodegradación de contaminantes orgánicos con luz solar

Sofía Estrada-Flores; Antonia Martínez-Luévanos; Elsa Nadia Aguilera-González

doi:10.29057/aactm.v10i10.11422

Sofía Estrada-Flores Autonomus University of Coahuila https://orcid.org/0000-0003-4706-3984
Antonia Martínez-Luévanos Autonomous University of Coahuila https://orcid.org/0000-0003-3499-1693
Elsa Nadia Aguilera-González Autonomus University of Coahuila https://orcid.org/0000-0002-6289-5992

DOI: https://doi.org/10.29057/aactm.v10i10.11422

Keywords: Anatase, TiO2-Fe2O3 composite, Organic pollulant, Photocatalysis, Mechanosynthesis

Abstract

In this work, the obtaining of the TiO₂-Fe₂O₃composite by mechanosynthesis using titanium oxide (TiO₂, with anatase phase) and iron trioxide (Fe₂O₃, with hematite phase) as precursors is investigated. The use of this composite as a photocatalyst for the degradation of organic molecules using natural sunlight is also investigated. The formation of the TiO₂-Fe₂O₃composite was confirmed by X-ray diffraction and infrared spectroscopy. The characterization of its optical properties was carried out by diffuse reflectance spectroscopy, while its texture and morphology were investigated by the BET technique and scanning electron microscopy, respectively. The results indicated that the TiO₂-Fe₂O₃composite contains OH groups, which together with the relatively high value of specific surface area (66.59 m²·g^-), its mesoporosity, low value of crystallite size, and low value of forbidden energy gap, favored its good photocatalytic efficiency to degrade methylene blue (64.74%) and diclofenac (81.85%) in aqueous solutions.

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