Spatially Separating Redox Centers on Z‐Scheme ZnIn<sub>2</sub>S<sub>4</sub>/BiVO<sub>4</sub> Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution
Jundie Hu, Chen Cao, Yang Zheng, Guping Zhang, Chunxian Guo, Chang Ming Li
Abstract
Abstract Photocatalysis technology using solar energy for hydrogen (H 2 ) production still faces great challenges to design and synthesize highly efficient photocatalysts, which should realize the precise regulation of reactive sites, rapid migration of photoinduced carriers and strong visible light harvest. Here, a facile hierarchical Z‐scheme system with ZnIn 2 S 4 /BiVO 4 heterojunction is proposed, which can precisely regulate redox centers at the ZnIn 2 S 4 /BiVO 4 hetero‐interface by accelerating the separation and migration of photoinduced charges, and then enhance the oxidation and reduction ability of holes and electrons, respectively. Therefore, the ZnIn 2 S 4 /BiVO 4 heterojunction exhibits excellent photocatalytic performance with a much higher H 2 ‐evolution rate of 5.944 mmol g −1 h −1 , which is about five times higher than that of pure ZnIn 2 S 4 . Moreover, this heterojunction shows good stability and recycle ability, providing a promising photocatalyst for efficient H 2 production and a new strategy for the manufacture of remarkable photocatalytic materials.