Abstract

The direct conversion of CO2 into propylene carbonate was investigated using pristine sodium titanate nanotubes (TNT) and nanowires (TNW) on which the ionic liquid (IL) 1-methyl-3-(3-trimethoxysilylpropyl)imidazolium chloride was supported, resulting in IL-TNTs and IL-TNWs, respectively. Anchorage of the IL through its organosilane groups (around 28wt%) on the surface of TNT and TNW was confirmed by FTIR, DRX, EDS and TGA analyses. All the nanostructured materials showed good catalytic activity after CO2 cycloaddition to propylene oxide. IL-TNTs and IL-TNWs exhibited high catalytic performance (TOF=46 and 49h−1, respectively) and 100% selectivity in propylene carbonate (propylene/catalyst molar ratio=580, cat/cocat molar ratio=2.4, 4.0MPa of CO2, 383.15K, 6h).

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