Synthesis of Mesostructured Materials of Different Heteroatoms and Their Catalytic Performances for Styrene Epoxidation

Abstract

FeS-1, VS-1 or CuS-1 precursors are loaded and highly dispersed on the surface of mesoporous materials SBA-15, MCM-41 or SiO2by impregnating method. The samples were characterized by X-ray diffraction, FT-IR spectroscopy, TEM and N2adsorption. Their catalytic performances for styrene epoxidation with anhydrous TBHP as an oxidant agent were studied. The results suggest that zeolite primary and secondary building units are highly dispersed on the samples and the samples have still retained mesoporous structure. All of the catalysts exhibit good catalytic activities, producing styrene oxide and benzaldehyde as the main products. Cu/SBA-15 shows high activity and selectivity, which are comparable with that of other samples. We find that, under the conditions of preferable precursors,n(TBHP)/n(styrene) =1.5, reaction temperature 80°C, and reaction time 2.0h, the conversion and yield of styrene epoxide reached 65.9% and 42.2%, respectively.

Preparation and Characterization of Silver Nanoparticles/Carbon Nanofibers via Electrospinning With Research on Their Catalytic Properties

“…[16][17][18] In recent years, the main research processes were oxygen source and catalyst aspects of epoxidation. 19,20 Metal catalysts provided a new idea for the realization of green industrial productions of styrene oxide which developed a new system gas-solid phase directly. 21 Among them, silver nanoparticles (Ag NPs) are particularly attractive because of the relatively excellent performance.…”