Síntesis, Caracterización y Actividad fotocatalítica de TiO2 depositada sobre SiO2 ? Fe3O4

CARLA HEREDIA; E. M. FARFÁN TORRES; E. L. SHAM

Otro; INVESTIGACIONES EN FACULTADES DE INGENIERÍA DEL NOA; 2020

CODINOA

TiO2 anatase phase was obtained at low temperature by the sol-gel technique. TiO2 has been deposited on a system of oxides made up of magnetic nuclei of Fe3O4 encapsulated by a mesoporous SiO2 network, which have been achieved from the incorporation in the synthesis by a cationic surfactant cetyltrimethylammonium bromide (CTAB). To promote the formation of the mesoporous structure, the CTAB was subsequently removed by calcination at 350 ° C. Different molar ratios [CTAB] / [Si] have been studied. The solids were characterized by XRD and specific surface BET. The photocatalytic activity of the catalysts was evaluated in the degradation of the artificial azo dye tartrazine, and the specific effectiveness of each catalyst was also analyzed, through turnover rate, thus obtaining the best photocatalytic performance. The observed results indicated that the deposition of titania on mesoporous silica results in a catalyst with improved photocatalytic activity.