(532dl) Investigating the Sustainability of the Different Types of Catalytic Sites in Aminosilica Materials

Research has shown that the high activity of heterogeneous catalyst, and its easy separation benefits for industrial usage. Next stage for the heterogeneous catalyst is on investigating the sustainability. Aminosilica materials have been used to reveal important structure-function behavior. Further investigation on recycle experiments can reveal that the catalytic activity of the material changes over time. The aminosilica (SBA-15 with amine) is applied in the Aldol condensation and reaction for the recycle test, and all the recycle materials are further applied with site quantification poisoning tests. Our results indicate that the highly active sites are transformed into lower activity sites. These results have important implications for material design. Overall, the work demonstrates the importance of a molecular understanding of cooperative interactions.