Study on Synthesis of Acid-Washed Illite Supported Fe3O4 Nanometer Catalyst and Baeyer–Villiger Oxidation Reaction of Cyclohexanone
- 8 Downloads
Baeyer–Villiger oxidation allows for effective control of the stereochemical structure of the product, which is a significant feature for functional group conversion and ring expansion in organic synthesis. In this study, Fe3O4 nanoparticles were loaded on acid-washed porous illite silicon slag (I-SR) using an in situ hydrothermal method to obtain the magnetic composite Fe3O4@I-SR. This composite was characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption–desorption isotherm measurements, vibrating sample magnetometer analysis, etc. The results indicated that the Fe3O4 nanoparticles had a face-centered cubic lattice geometry with an average size of about 10 nm; the nanoparticles were uniformly dispersed on the surface of the carrier (I-SR) and exhibited strong paramagnetism. Fe3O4@I-SR composite was found to be a promising and efficient catalyst with high activity (> 99% cyclohexanone conversion and > 99% ε-caprolactone selectivity) for the Baeyer–Villiger of cyclohexanone to ε-caprolactone. The catalyst could be easily separated from the reaction mixture and reused many times. Thus, Fe3O4@I-SR is an attractive multiphase catalyst that is easy to handle and recycle under environmentally friendly reaction conditions.
KeywordsIllite Fe3O4 Baeyer–Villiger oxidation
Illite silicon slag
Transmission electron microscopy
Scanning electron microscopy
- FT IR
Fourier transform infrared
This work was supported by the National Natural Science Foundation of China (Grant No. 21661031 and No. 21263026).