A Tandem 0D/2D/2D NbS<sub>2</sub> Quantum Dot/Nb<sub>2</sub>O<sub>5</sub> Nanosheet/g‐C<sub>3</sub>N<sub>4</sub> Flake System with Spatial Charge–Transfer Cascades for Boosting Photocatalytic Hydrogen Evolution
Bo Lin, Zihao Chen, Pin Song, Haishi Liu, Lixing Kang, Jun Di, Xiao Luo, Long‐Qing Chen, Chao Xue, Bowen Ma, Guidong Yang, Jun Tang, Jiadong Zhou, Zheng Liu, Fucai Liu
Abstract
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 NbS 2 quantum dot/Nb 2 O 5 nanosheet/g‐C 3 N 4 flake (NSNOCN) system is designed. Owing to the unique spatial‐arrangement and elaborate morphology of 0D NbS 2 , 2D Nb 2 O 5 , and 2D g‐C 3 N 4 in the newly designed NSNOCN, plenty of spatial charge–transfer cascades from g‐C 3 N 4 to NbS 2 via Nb 2 O 5 are formed to accelerate separation and transfer of charges significantly, thus contributing to a high photocatalytic H 2 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‐C 3 N 4 and Nb 2 O 5 , respectively. This work can provide a new platform in the design of artificial photocatalytic systems with high charge–transfer efficiency.