Direct Synthesis and Characterization of Co₃O₄/SBA-15 and Co₃O₄-CeO₂/SBA-15

Co3O4/SBA-15 composite materials can be directly synthesized through adding the precursor salts(Co(NO3)2·6H2O)into the synthetic system, recovering the composites via evaporation and subsequent calcinations. A series of characterization results (XRD, SEM and IR) have shown that the materials prepared by direct synthesis methods keep the highly ordered two-dimensional hexagonal mesoporous structure when the Co/Si molar ratio is less than 1∶3 in the initial synthetic materials. The guest oxides were dispersed into the SBA-15 matrix, and the part of the guest was incorporated in the framework of SBA-15. In addition, Co3O4-CeO2/SBA-15 composite materials were synthesized by direct methods. These materials are promising as catalysts.