Reactive & Functional Polymers, Vol.138, 79-87, 2019
High photocatalytic activity of Cu@Cu2O/RGO/cellulose hybrid aerogels as reusable catalysts with enhanced mass and electron transfer
In this work, hierarchically porous Cu doped Cu2O/reduced graphene oxide/cellulose (Cu@Cu2O/RGO/CE) hybrid catalysts were facilely prepared by in-suit deposition of Cu2O nanoparticles on 3D graphene oxide/cellulose (GO/CE) aerogels. The morphology, structure, optical properties, and photocatalytic performances of the resultant Cu@Cu2O/RGO/CE hybrid catalysts were investigated systematically. GO uniformly dispersed in cellulose matrix and induced the formation of homogeneous GO/CE hydrogels. And highly uniform octahedral Cu doped Cu2O nanoparticles anchored on the pore wall of the GO/CE aerogels without aggregation. The photocatalytic activity of Cu@Cu2O/RGO/CE hybrid catalysts for methyl orange (MO) was 2 times high to that of Cu2O/CE under visible light. This high photocatalytic activity of Cu@Cu2O/RGO/CE hybrid catalysts mainly derived from its specific hierarchical porous structure and hybrid phase compositions which were responsible for enhanced light harvesting, abundant catalytic active sites, excellent mass and electron transfer ability. Moreover, the Cu@Cu2O/RGO/CE hybrid catalysts could easily be recycled from aqueous solution and exhibited superior stability in cycle experiments. The main active species were detected to be. O-2(-) ,. OH and holes under visible light irradiation. Thus, this work provides a facile approach for preparing high-efficiency and easy recoverable photocatalysts, but also a promising technology for organic pollutant degradation.