3 years ago

Nitrogen-containing ordered mesoporous carbon grafted by alkyl bromide: Simple synthesis and its catalytic application in solvent-free cycloaddition of CO2

Nitrogen-containing ordered mesoporous carbon grafted by alkyl bromide: Simple synthesis and its catalytic application in solvent-free cycloaddition of CO2
Nitrogen-containing ordered mesoporous carbon (NOMC) materials were prepared through a soft-templating method and then utilized as supports to immobilize alkyl bromide. The physicochemical properties of the synthesized materials (prop-Br/NOMCs) were characterized by several techniques including N2 adsorption–desorption, small-angle XRD, TEM, XPS, and elemental analysis. As heterogeneous catalysts, the prop-Br/NOMC samples exhibited good catalytic activity and high selectivity in solvent-free cycloaddition of CO2 with propylene oxide (PO). The maximum PO conversion reached ca. 83% at 150 °C. Based on the characterization results, it is speculated that the catalytic active sites are quaternary amines and bromide anions which came from the reaction between heterocyclic nitrogen of NOMC and alkyl bromide.

Publisher URL: www.sciencedirect.com/science

DOI: S1387181117306340

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