Using the homogeneous colloidal mixture of conductive metal oxide nanosheet (NS) and reduced graphene oxide (rGO) NS as hybridization matrices provides universal way of optimizing the photocatalyst functionality of semiconductor nanocrystals. A self-assembly between CdS quantum dots (QDs) and RuO2/rGO NSs yields strongly coupled ternary nanohybrids with enhanced photocatalytic activity and increased porosity. Even with its lower RuO2 content, the ternary CdS−RuO2/rGO nanohybrid exhibits notably higher photocatalytic activities for visible-light-induced H2 evolution and photocurrent generation than binary CdS−RuO2/rGO homologues, underscoring the synergetic hybridization effect of flexible rGO and hydrophilic RuO2 NSs. In comparison with single RuO2/rGO NSs, their homogeneous mixture can play better roles of photosensitizers and cocatalysts, which is mainly responsible for remarkable improvement of photocatalytic activity upon the cohybridization with mixed RuO2/rGO NSs. The current study underscores that cohybridization with complementary inorganic and graphene NSs can provide an efficient and economically feasible methodology to explore novel high-performance catalyst materials.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (grant no. NRF‐2017R1A5A1015365), by the Korea government (MSIP) (grant no. NRF‐2020R1A2C3008671), and by the Technology Innovation Program‐Alchemist Project (grant no. 20012315) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). The experiments at PAL were supported in part by MOST and POSTECH.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Energy Engineering and Power Technology
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering