Ibuprofen degradation under LED visible light, using self doped carbon mesoporous TiO2

PABLO A. OCHOA RODRÍGUEZ; MARÍA MAFFEI; CANDELARIA ESCALANTE; TAMARA B. BENZAQUÉN; SEBASTIÁN ELUANI; NATALIA I. CUELLO; SANDRA G. CASUSCELLI; VERÓNICA R. ELÍAS; GRISELDA A. EIMER

Modalidad virtual

Congreso; XXVII Congreso Iberoamericano de Catálisis; 2020

TiO2 nanoparticles were obtained from a simple sol-gel synthesis method. The synthesized solids were characterized by XRD, UV-Vis DR spectroscopy, N2 adsorption-desorption, and TEM. The studies allowed confirming the mesoporous nature of all samples and the existence of a crystalline phase consisting of pure anatase. Since a template agent was not used during the synthesis, it was not necessary to subject the catalysts to final treatments with high temperatures. However, the effect of calcination temperature on the photocatalytic performance of the materials was studied, in terms of the degradation of Ibuprofen (IBF) in aqueous solution under visible LED light. It was confirm that the absence of calcination allows the solid to remain self-doped with carbon species, which come from the same source used for titanium, and would be responsible for absorption towards wavelengths corresponding to the visible range of the spectrum. In addition, it could be determined that at 200 ° C the photocatalytic activity improves, since the positive electron / hole recombination is delayed and more carbon enters the matrix. In this way, the optimal conditions for obtaining a mesoporous material capable of being activated under visible light were specified.