Study on Surface Modification of Mesporous Silica SBA-15

In this paper, the mesoporous silica SBA-15 surface was modified by using silane coupling agent KH-540. In order to investigate the best modification conditions, effects of KH-540 dosage, reaction time and temperature were studied. The modified mesoporous silica SBA-15 was characterized by TGA, FTIR, XRD and N 2 adsorption-desorption etc. The best modification conditions were obtained as follows: KH-540 dosage is 0.5g, reaction temperature is 90°C and reaction time is 4 hours. The results showed that KH-540 is successfully grafted on the surface of SBA-15, the SBA-15-KH540 possess a well ordered hexagonal mesoporous structure. Compared with pure SBA-15, the surface area, the pore size and the pore volume of the SBA-15-KH540 are decreased slightly.