Synthesis, characterization of TiO2/SBA-15 and investigation in photo catalytic reactions

In this study, TiO2/SBA-15 photocatalyst, different amounts of TiO2 by weight were synthesized by using hydrothermal synthesis method. The synthesized catalysts were characterized by XRD, SEM-EDX, XRF, N2 adsorption/desorption and UV-Vis-NIR-DRS. Acording to the characterization results; TiO2/SBA-15 catalysts were successfully synthesized by hydrothermal method. Photocatalytic activities of TiO2/SBA-15 catalysts were investigated under UV light on methylene blue degradetion. The best removal efficiency of %79,58 was obtained in the presend of TiO2/SBA-15 (R=16). Metal doped TiO2/SBA-15 (Fe, Co, Cu, Ni, Cr) catalysts were produced by impregnation method on TiO2/SBA-15 (R=16) catalyst, which has the highest photocatalytic activity. The synthesized metal-TiO2/SBA-15 catalysts were characterized by XRD, SEM-EDX, XRF, N2 adsorption/desorption and UV-Vis-NIR-DRS. As a result of the characterization, it was observed that metal doping did not change the mesoporous structure. Photocatalytic activities of metal- TiO2/SBA-15 catalysts were investigated on methylene blue under UV light and visible light. Among all catalysts, the best catalyst was %10 Co-TiO2/SBA-15 which is a methylene blue removal efficiency of %69,58. Reusability studies of TiO2/SBA-15 (R=16) and %10 Co- TiO2/SBA-15 catalysts, which provide the highest dye removal efficiency, were conducted in the five cycles and it was observed that their photocatalytic activities did not decrease.