Electrostatic self‐assembly of 2D‐2D CoP/ZnIn <sub>2</sub> S <sub>4</sub> nanosheets for efficient photocatalytic hydrogen evolution
Zhongqing Xiang, Huijuan Guan, Bing Zhang, Yafei Zhao
Abstract
Abstract Constructing efficient and cost‐effective photocatalysts are highly desirable for photocatalytic hydrogen evolution. Herein, we prepare a unique 2D‐2D architecture photocatalyst composed of CoP and ZnIn 2 S 4 (ZIS) nanosheets through electrostatic self‐assembly method. The constructed 2D‐2D CoP/ZIS exhibit a remarkably enhanced photocatalytic performance with hydrogen production rate of 8.775 mmol g −1 h −1 , and this value is much higher than ZIS and most of other ZIS‐based nanohybrids. Additionally, the nanohybrids possess excellent stability with 96.3% of initial activity remaining after 24 hours of testing. These satisfactory results are attributed to the large/intimate contact interface and the photo/electro‐chemical properties of ZIS and CoP, which improves light absorption, facilitates photoelectron transport and suppresses charge recombination. This work not only demonstrates ZIS nanosheet can serve as a versatile and effective platform supporting non‐noble metal nanosheets to boost their photocatalytic performance, but also offers a general and simple electrostatic self‐assembly method to design 2D‐2D‐based heterostructures for hydrogen conversion from water splitting.