مشخصات پژوهش

Green oxidation of alcohols to carbonyl groups by catalytic methods is very attractive, but finding cost-effective catalytic systems is still a challenge. In this work, we report a novel oxidation system using Fe2W18Fe4-TiO2-CTS as the catalyst and hydrogen peroxide as the oxidant. The nanocatalyst was synthesized by the reaction of sandwich polyoxometalate (Fe2W18Fe4), TiO2, and chitosan (CTS) via a sol-gel method, and characterized by FT-IR and XRD techniques. Reaction parameters such as time, temperature, catalyst dosage, and catalyst type were systematically investigated to maximize alcohol conversion. The best conversion of 88% was achieved at 65°C for 2 hours using 100 mg of the Fe2W18Fe4- TiO2- CTS catalyst. Furthermore, the Fe2W18Fe4- TiO2- CTS catalyst can be easily separated by simple filtration and reused. The catalyst exhibited reusability and stability after five cycles. Product separation, identification, and quantification were performed by GC.