Fabrication and enhanced visible-light photocatalytic H2 production of B-doped N-deficient g-C3N4/CdS Hybrids with robust 2D/2D hetero-interface interaction

Abstract 2D layered photocatalysts with proper electronic structure have sparked much attention in the field of visible-light photocatalysis for H 2 production. Herein, by simply calcining the mixture of ultrathin g-C 3 N 4 (CNN) and NaBH 4 , heteroatom B and N defect were simultaneously introduced into g-C 3 N 4 . The obtained modified g-C 3 N 4 (BDCNN) was further coupled with 2D flower-like CdS nanosheet. The optimal 2D/2D BDCNN/CdS-15% heterojunction behaved ideal photocatalytic activity for H 2 revolution by water splitting, and the highest H 2 revolution rate was as high as 1013.8 μ mol g −1 h −1 , which was 6.7 times, 2 times, and 5.8 times of the corresponding values of pristine CNN, BDCNN and CdS respectively. It was evidenced that the band structure of 2D/2D BDCNN/CdS-15% was well tuned for better visible-light adsorption and higher separation efficiency of photo-induced carriers for enhancing H 2 revolution performance. The achievement in this study provided informative principles for exploring g-C 3 N 4 based heterojunctions with higher H 2 -production performance.