Fabrication and enhanced visible-light photocatalytic H2production of B-doped N-deficient g-C3N4/CdS Hybrids with robust 2D/2D hetero-interface interaction

Guoliang Chu; Lingfang Qiu; Ke Wen; Ping Li; Banpeng Cao; Yi Tang; Xiangshu Chen; Hidetoshi Kita; Shuwang Duo

doi:10.1088/1361-6528/acb1b6

Fabrication and enhanced visible-light photocatalytic H₂production of B-doped N-deficient g-C₃N₄/CdS Hybrids with robust 2D/2D hetero-interface interaction

Nanotechnology. 2023 Jan 30;34(15). doi: 10.1088/1361-6528/acb1b6.

Authors

Guoliang Chu¹, Lingfang Qiu^{1

2}, Ke Wen¹, Ping Li¹, Banpeng Cao¹, Yi Tang², Xiangshu Chen³, Hidetoshi Kita⁴, Shuwang Duo¹

Affiliations

¹ Jiangxi Key Laboratory of Surface Engineering, 1 Jiangxi Science and Technology Normal University, Nanchang 330013, People's Republic of China.
² Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
³ Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China.
⁴ Graduate School of Science and Technology for Innovation, Graduate School Science and Engineering, Yamaguchi University, Ube 755-8611, Japan.

PMID: 36626828
DOI: 10.1088/1361-6528/acb1b6

Abstract

2D layered photocatalysts with proper electronic structure have sparked much attention in the field of visible-light photocatalysis for H₂production. Herein, by simply calcining the mixture of ultrathin g-C₃N₄(CNN) and NaBH₄, heteroatom B and N defect were simultaneously introduced into g-C₃N₄. The obtained modified g-C₃N₄(BDCNN) was further coupled with 2D flower-like CdS nanosheet. The optimal 2D/2D BDCNN/CdS-15% heterojunction behaved ideal photocatalytic activity for H₂revolution by water splitting, and the highest H₂revolution rate was as high as 1013.8μmol g^-1h^-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 H₂revolution performance. The achievement in this study provided informative principles for exploring g-C₃N₄based heterojunctions with higher H₂-production performance.

Keywords: 2D/2D heterojunction; B-dope; H2 production; N defect; g-C3N4.