Catalytic Activity of Ti-Modified MCM-41 for Oxidation of Secondary Alcohol with H2O2

In this study, titanium-containing MCM-41 has been synthesized through wet impregnation and direct hydrothermal synthesis methods and used for the oxidation of secondary alcohol to a carbonyl compound in the presence of hydrogen peroxide. FT-IR, BET, XRD, SEM-EDX, and Raman spectroscopy has been used to characterize the prepared mesostructured catalysts and the obtained results revealed that the Ti was successfully inserted into the MCM-41 framework. XRD results showed that the hexagonal structure of the mesoporous material of all samples was preserved, but the Ti-MCM-41(20) showed a slightly distorted porous structure. Oxidation of 1-phenyl-1-propanol using aqueous 30% H2O2 as an oxidant in dichloromethane was also performed to investigate the catalytic performance. Ti inserted directly into the mesoporous silica gel showed better catalytic performance (95-98%). The Ti/Al-MCM-41 prepared by impregnation exhibits significantly high catalytic activity (99%) for secondary alcohol oxidation and showed excellent regeneration ability. MCM-41 may have considerable potential application in future industrial applications. [GRAPHICS]

Automated summary

In this study, titanium-containing MCM-41 was synthesized and used as a catalyst for the oxidation of secondary alcohol. Characterization techniques such as FT-IR, BET, XRD, SEM-EDX, and Raman spectroscopy were used to analyze the catalysts and the results showed successful insertion of Ti into the MCM-41 framework. The catalytic performance of Ti-MCM-41 and Ti/Al-MCM-41 was evaluated, with Ti directly inserted into mesoporous silica gel showing better performance and Ti/Al-MCM-41 prepared by impregnation exhibiting high catalytic activity and regeneration ability.