3D Hierarchical ZnIn₂S₄ Nanosheets with Rich Zn Vacancies Boosting Photocatalytic CO₂ Reduction

Zinc vacancy (V Zn ) is successfully introduced into 3D hierarchical ZnIn 2 S 4 (3D‐ZIS). The photo‐electrochemical experiments demonstrate that the charge separation and carrier transfer are more efficient in the 3D‐ZIS with rich V Zn . Of note, for the first time, it is found that V Zn can decrease the carrier transport activation energy (CTAE), from 1.14 eV for Bulk‐ZIS (Bulk ZnIn 2 S 4 ) to 0.93 eV for 3D‐ZIS, which may provide a feasible...