Catalysts 2026, 16(2), 146; https://doi.org/10.3390/catal16020146 - 2 Feb 2026
Abstract
In this study, we present the synthesis of TiO2 nanomaterials doped with different mol% cobalt, prepared by the sol–gel method for CO2 reduction using UV light. The nanomaterials were calcined at 400 °C for 4 h. Characterization of the nanomaterials was
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In this study, we present the synthesis of TiO2 nanomaterials doped with different mol% cobalt, prepared by the sol–gel method for CO2 reduction using UV light. The nanomaterials were calcined at 400 °C for 4 h. Characterization of the nanomaterials was performed using XRD-Rietveld refinement, XPS, Raman spectroscopy, diffuse reflectance spectroscopy (DRS), SEM-EDS, TEM-HRTEM, BET area, photoluminescence, and electrochemical techniques. The results show that the incorporation of cobalt into TiO2 modifies the structural properties, binding energies, and oxygen vacancy generation, it undergoes a shift towards the visible region, the recombination of charge carriers decreases, and the BET area is slightly modified. The photoreduction of CO2 with the highest production of methane and ethane is with 1% mol% of cobalt in TiO2, exhibiting values 3 and 14 times higher with respect to TiO2, which is attributed to the efficiency in the separation of photogenerated species (e−/h+) as a consequence of the generation of energetic states that function as an electron trap and thus improve the photocatalytic activity for the photoreduction of CO2.
Full article
(This article belongs to the Special Issue Advances in Photocatalytic Degradation, 2nd Edition)
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