MoS₂/SnNb₂O₆ 2D/2D nanosheet heterojunctions with enhanced interfacial charge separation for boosting photocatalytic...

Semiconductor-based photocatalytic hydrogen evolution through water splitting is of great importance for tacking the ever-increasing energy concerns. Here, novel visible-light-driven MoS₂/SnNb₂O₆ 2D/2D nanosheet heterojunction for photocatalytic hydrogen evolution was designed and fabricated by a facile hydrothermal method. The as-prepared 2D/2D heterojunctions not only offer extended visible light absorption range but also accelerate the separation and transfer efficiency of charge carriers owing to the typical 2D interface. Therefore, the MoS₂/SnNb₂O₆ 2D/2D heterojunctions showed superior H₂ evolution photocatalytic performance compared with bare MoS₂ and SnNb₂O₆ nanosheet. The optimal H₂ production rate of as-prepared MoS₂/SnNb₂O₆ heterojunction was up to 4.3-fold and 5-fold as high as that of bare SnNb₂O₆ and MoS₂. This works will provide a new perspective on the development of 2D/2D nanosheet heterojunction photocatalysts with high performance for water splitting.