In situ ion exchange synthesis of MoS2/g-C3N4 heterojunctions for highly efficient hydrogen production. (11th December 2017) - Wang, Min
Abstract : Tight nanojunctions between g-C3 N4 and MoS2 were constructed, which facilitate the separation of photogenerated charge carriers. Abstract : Novel and advanced photocatalytic materials for water splitting are of huge interest due to the increasing global energy crisis. In this work, MoS2 /g-C3 N4 heterojunctions are prepared as high-performance photocatalysts for hydrogen evolution using solar energy. Benefiting from the elaborate ion exchange, uniformly dispersed MoS2 quantum dots with controllable size and a high loading amount grow in situ on the surface of g-C3 N4 nanosheets through a simple hydrothermal process, and tight heterostructures are obtained at the interface between the two semiconductors. The quantization of MoS2 enhances its redox activity in water splitting, and the compact heterojunction facilitates the separation of photoinduced charge carriers, resulting in efficient photocatalytic H2 production at the MoS2 /g-C3 N4 heterojunction. This work highlights ion exchange as a facile and effective method for obtaining high efficiency MoS2 /g-C3 N4 heterojunction photocatalysts.