Photocatalytic activity of Cu2O supported on multi layers graphene for CO2 reduction by water under batch and continuous flow

Abstract

The photocatalytic activity of Cu2O supported on multi-layers graphene for CO2 reduction by water was studied under two hydrodynamic environments, in a slurry batch reactor and in a capillary reactor with the catalyst immobilized on the wall. Under both conditions, the major photoproduct was hydrogen observed in the gas phase, accompanied by lesser amounts of ethanol present in the aqueous solution. The maximum production rates were 2031 and 545μmolg−1h−1 for H2 and CH3CH2OH, respectively, and were found under the hydrodynamic mode attained in the capillary reactor.