Hierarchical 0D NiSe<sub>2</sub>/2D ZnIn<sub>2</sub>S<sub>4</sub> Nanosheet‐Assembled Microflowers for Enhanced Photocatalytic Hydrogen Evolution
Lijuan Lai, Fangshu Xing, Chuchu Cheng, Caijin Huang
Abstract
Abstract Hierarchical structure design and use of cocatalyst are effective strategies to improve the photocatalytic performance of semiconductor catalysts. Herein, 0D NiSe 2 nanoparticles decorated 2D ZnIn 2 S 4 ultrathin nanosheet‐assembled microflowers using a facile solvothermal approach are synthesized. The as‐obtained NiSe 2 /ZnIn 2 S 4 nanocomposites exhibit enhanced visible‐light photocatalytic H 2 ‐evolution activity of 1487 µ mol (g h) –1 , three times higher than that of pure ZnIn 2 S 4 . The hierarchical structure of ZnIn 2 S 4 microflowers exposes more surface‐active sites and enhances light harvesting. Meanwhile, the formation of heterojunctions between ZnIn 2 S 4 nanosheets and NiSe 2 nanoparticles creates a space‐charge separation region that facilitates the transfer and separation of photoinduced electrons and holes, resulting in improved photocatalytic H 2 production. This work provides a promising strategy for designing and constructing 0D/2D heterojunctions for efficient solar‐driven energy conversion.