Synergetic Hybridization Effect of Homogeneously Mixed Inorganic and Graphene Nanosheets on the Photocatalytic Activity of Semiconductor

摘要

Using the homogeneous colloidal mixture of conductive metal oxide nanosheet(NS) and reduced graphene oxide (rGO) NS as hybridization matrices providesuniversal way of optimizing the photocatalyst functionality of semiconductornanocrystals. A self-assembly between CdS quantum dots (QDs) and RuO_2/rGO NSs yields strongly coupled ternary nanohybrids with enhanced photocatalyticactivity and increased porosity. Even with its lower RuO_2 content, theternary CdSRuO_2/rGO nanohybrid exhibits notably higher photocatalyticactivities for visible-light-induced H2 evolution and photocurrent generationthan binary CdSRuO_2/rGO homologues, underscoring the synergetichybridization effect of flexible rGO and hydrophilic RuO2 NSs. In comparisonwith single RuO_2/rGO NSs, their homogeneous mixture can play better roles ofphotosensitizers and cocatalysts, which is mainly responsible for remarkableimprovement of photocatalytic activity upon the cohybridization with mixedRuO_2/rGO NSs. The current study underscores that cohybridization withcomplementary inorganic and graphene NSs can provide an efficient andeconomically feasible methodology to explore novel high-performance catalystmaterials.