A Tandem 0D/2D/2D NbS2 Quantum Dot/Nb2O5 Nanosheet/g‐C3N4 Flake System with Spatial Charge–Transfer Cascades for Boosting Photocatalytic Hydrogen Evolution. Issue 42 (23rd September 2020) - Lin, Bo
Abstract: The relatively high recombination rate of charges remains the most critical limiting factor for solar‐driven water splitting for hydrogen generation. Herein, a tandem 0D/2D/2D NbS2 quantum dot/Nb2 O5 nanosheet/g‐C3 N4 flake (NSNOCN) system is designed. Owing to the unique spatial‐arrangement and elaborate morphology of 0D NbS2, 2D Nb2 O5, and 2D g‐C3 N4 in the newly designed NSNOCN, plenty of spatial charge–transfer cascades from g‐C3 N4 to NbS2 via Nb2 O5 are formed to accelerate separation and transfer of charges significantly, thus contributing to a high photocatalytic H2 generation rate of 13.99 mmol h −1 g −1 (an apparent quantum efficiency of 10.8% at 420 nm), up to 107.6 and 43.7 times by contrast with that of g‐C3 N4 and Nb2 O5, respectively. This work can provide a new platform in the design of artificial photocatalytic systems with high charge–transfer efficiency. Abstract : A tandem 0D/2D/2D NbS2 quantum dot/Nb2 O5 nanosheet/g‐C3 N4 flake (NSNOCN) system is developed. The unique spatial arrangement and morphology of NbS2, Nb2 O5, and g‐C3 N4 in the newly designed NSNOCN can introduce plenty of spatial charge–transfer cascades from g‐C3 N4 to NbS2 via Nb2 O5 to accelerate the charge transfer and boost the photocatalytic H2 evolution activity.