CuO Impregnated mesoporous silica KIT-6: a simple and efficient catalyst for benzene hydroxylation by C-H activation and styrene epoxidation reactions

摘要

Copper oxide doped mesoporous KIT-6 materials were synthesized by ultrasonication as impregnation method. The highly ordered nature of mesoporous CuO-KIT-6 materials analyzed by low angle X-ray diffraction. The high surface area, pore diameter and mesoporous nature of synthesized materials were confirmed by BET surface area analysis. Si-O-Si, Si-OH and Cu-O-Si bonds in the framework of CuO-KIT-6 were verified by FTIR spectroscopy. The Cu2+ a dagger O2- charge-transfer transitions and d-d transitions of dispersed Cu2+ on ordered mesoporous KIT-6 were identified by DRS UV-Vis spectroscopy. The morphology of the synthesized CuO-KIT-6 materials was analyzed by HR-SEM. The 3D ordered nature of CuO-KIT-6 confirmed by TEM analysis. The highly ordered 3D mesoporous CuO-KIT-6 materials are excellent catalyst for benzene hydroxylation reaction through C-H activation and styrene epoxidation reaction with 30 % aqueous H2O2. The catalyst CuO-KIT-6 itself showed a good conversion towards both reactions.