|
1
|
Xu L, Li C, Xiong SX, Tang S, Xu Z, Cao L, Tao J, Zhang Y, Dong K, Wang LL. A bicomponent synergistic Mo xW 1-xS 2/aluminum nitride vdW heterojunction for enhanced photocatalytic hydrogen evolution: a first principles study. Phys Chem Chem Phys 2024; 26:2973-2985. [PMID: 38224019 DOI: 10.1039/d3cp05411j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
The coupling of two-dimensional van der Waals heterojunctions is an effective way to achieve photocatalytic hydrogen production. This paper designs the MoxW1-xS2/AlN (x = 0, 0.25, 0.5, 0.75, 1) van der Waals heterojunction as a possible photocatalytic material. By using first-principles calculations, the effects of different Mo/W ratios on the band gap and photocatalytic hydrogen production performance of heterojunctions were investigated. The results show that the heterojunction is a direct Z-scheme photocatalyst and can achieve overall water splitting. By calculating the absorption spectrum, it is found that the heterojunction has a wider visible light absorption range when the bimetal is added, and there is still a strong absorption peak at 615 nm. With the increase of the Mo atom ratio, the absorption spectrum is red-shifted. The Gibbs free energy of the two-component Mo0.5W0.5S2/AlN heterojunction is only -0.028 eV. Our work provides a new perspective for the modification of 2D transition metal dichalcogenide photocatalytic heterojunctions.
Collapse
Affiliation(s)
- Liang Xu
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
- Kungfu Sci-tech Co., Ltd., Nanchang 330096, China
- Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China
| | - Can Li
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - S X Xiong
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - Shuaihao Tang
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - Zhiqiang Xu
- Kungfu Sci-tech Co., Ltd., Nanchang 330096, China
| | - Lei Cao
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - Ji Tao
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - Ying Zhang
- Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices, School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China.
| | - Kejun Dong
- Centre for Infrastructure Engineering, School of Engineering, Design and Built Environment, Western Sydney University, Penrith, NSW 2751, Australia.
| | - Ling-Ling Wang
- Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China
| |
Collapse
|