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Updated: May 21, 2025

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Published on: November 29, 2016
Z-Scheme heterostructures of 2D SnC/Sc2CCl2 for overall water splitting with strong redox potential under visible
Xingyong Huang1,2, Mingjie Wan1, Qilong Cao1
1School of Mathematics and Physics, Yibin University, Yibin, Sichuan, 644007, China. huangxy820@163.com.
Abstract:
The two-dimensional (2D) Z-scheme system is an effective approach for hydrogen production via photocatalytic water splitting (PWS). This study established a 2D van der Waals (vdW) SnC/Sc2CCl2 heterojunction for PWS. The electronic and optical properties of the designed heterojunction were determined using first-principles methods, showing that the heterojunction, acting as a Z-scheme photocatalyst (ZSP), formed an induced internal electric field to achieve effective electron-hole separation. The strong redox ability (∼1.5 eV) and moderate energy barrier of the SnC/Sc2CCl2 heterojunction further enabled efficient PWS. Moreover, the PWS process benefited from the heterojunction's favorable absorption coefficient (105 cm-1) and solar-to-hydrogen conversion efficiency (21.36%) under visible light. The proposed Z-scheme SnC/Sc2CCl2 heterojunction is a promising candidate for photocatalytic overall water splitting (POWS) across a pH range of 0-14.
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