Resumo

CASTANEDA, Claudia; MARTINEZ, José J.  e  MESA, Andrés. Esterification of levulinic acid via catalytic and photocatalytic processes using fluorinated titanium dioxide materials. Rev.fac.ing.univ. Antioquia [online]. 2022, n.105, pp.29-36.  Epub 02-Jun-2023. ISSN 0120-6230.  https://doi.org/10.17533/udea.redin.20210531.

This study evaluated the synthesis, characterization, and activity of fluorinated titanium dioxide materials (TiO2-F 1% and TiO2-F 5%) in-situ modified by the sol-gel method in the esterification reaction of levulinic acid conducted by catalytic and photocatalytic processes. The physicochemical properties of the materials were determined by X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, thermal analysis, and pyridine adsorption. It was found that the inclusion of fluoride anion causes a decrease in the levulinic acid conversion by photocatalytic reaction; however, in the catalytic activation, a slight increase in the conversion using the fluoride materials was observed. Finally, the reaction in the presence of halogenated solvents (CCl4) by photolysis reaction favors a conversion of 100% in 1h.

Palavras-chave : Catalysis; photocatalysis; levulinic acid; esterification; TiO₂-F.

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