van der Waals type II carbon nitride homojunctions for visible light photocatalytic hydrogen evolution

Authors

Xiaojie Li
Panpan Zhang
Huayang Zhang
Wenjie Tian
Yangyang Yang
Kunsheng Hu
Dechao Chen
Qin Li
Xiaoguang Duan
Hongqi Sun, Edith Cowan UniversityFollow
Shaobin Wang

Author Identifier

Hongqi Sun

ORCID : https://orcid.org/0000-0003-0907-5626

Document Type

Journal Article

Publication Title

Nano Research

Publisher

Tsinghua University Press and Springer- Verlag GmbH Germany

School

School of Engineering

RAS ID

39687

Funders

Australian Research Council

Australian Government

Government of Western Australia

Grant Number

ARC Number : DP170104264

Grant Link

http://purl.org/au-research/grants/arc/DP170104264

Comments

Li, X., Zhang, P., Zhang, H., Tian, W., Yang, Y., Hu, K., . . . & Wang, S. (2023). van der Waals type II carbon nitride homojunctions for visible light photocatalytic hydrogen evolution. Nano Research, 16, 5864-5872.

https://doi.org/10.1007/s12274-021-3744-x

Abstract

Photocatalytic hydrogen evolution reaction (PC-HER) provides a solution to energy crisis and environmental pollution. Herein, different graphitic carbon nitride (g-C₃N₄)-based van der Waals (vdW) type II homojunctions have been fabricated and g-C₃N₄/K-doped g-C₃N₄ nanosheets have an outstanding PC-HER rate of 1,243 µmol-h⁻¹·g⁻¹ under visible light, higher than that of bulk g-C₃N4, doped g-C₃N₄ nanosheets, and mixed nanosheets. The enhanced PC-HER performance can be ascribed to the cooperative effects of the shortened bandgap, enlarged specific surface area, matched type II energy band structure, “face to face” vdW charge interaction, and peculiarly partite positions of the conduction and valence bands in different layers. Besides, the type II junctions were found superior to binary type II junction. This study highlights the synergistic effect of different strategies in improving the PC-HER capacities of g-C₃N₄, especially the application of particular vdW junctions, and provides new insights to the structures and mechanism.

DOI

10.1007/s12274-021-3744-x

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