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Dr. Valdés-Morales, Héctor
Research Outputs
A theoretical and experimental approach for photocatalytic degradation of caffeic acid using BiOBr microspheres
2021, Dr. Valdés-Morales, Héctor, Otilia Diaz, N., Rodríguez, C., Durán-Álvarez, Juan, Talreja, Neetu, Quispe-Fuentes, Issis, Martínez-Avelar, Carolina, Bizarro, Monserrat, Mera, Adriana
This study describes theoretical and experimental considerations to optimize the photocatalytic degradation of caffeic acid in water using 3D-BiOBr based materials under visible light irradiation. Three BiOBr materials were synthesized through the solvothermal method using different bromide sources, namely potassium bromide (KBr) and the ionic liquid (IL) 1-butyl-3-methylimidazolium bromide. Morphological and chemical changes were observed in IL based 3D-BiOBr materials. The theoretical optimization of the experimental conditions in heterogeneous photocatalysis tests (pH and dose of catalyst) were simulated using the MODDE 12.0.1 software. A central composite design (CCD) was applied to obtain a response surface to elucidate the optimal conditions. This model predicted that the maximum photocatalytic degradation can be achieved at pH of 6.7 and a photocatalyst dose of 344 mg L−1. The optimal experimental conditions were tested using the three synthesized 3D-BiOBr materials. The results showed that the highest degradation efficiency and mineralization yield were obtained using the BiOBr microspheres synthesized with the IL at 145 °C.