Well-organized migration of electrons for enhanced hydrogen evolution: Integration of 2D MoS 2 nanosheets with plasmonic photocatalyst by a facile ultrasonic chemical method

摘要

Graphical abstractDisplay OmittedAbstractThe construction of a plasmonic photocatalyst is an efficient way to suppress detrimental electrons-holes recombination and extend the spectral range of light absorption in semiconductors. However, the facilitation effect in the aspect of electrons-holes separation is great limited as the lack of a driving force compelled the electrons or holes migration to surface catalytic sites makes them flow randomly in semiconductors. In this work, we confirm that the integration of MoS2nanosheets formed two dimensional (2D) layered heterojunction with C3N4with Au-C3N4plasmonic photocatalyst can further enhance electrons-holes separation through the formation of Au-C3N4-MoS2nanostructure by a facile ultrasonic chemical method. The integrated MoS2nanosheets extract the electrons not only from C3N4due to a building up of 2D layered heterojunction but also from plasmonic Au via a “pipe” played by C3N4. The electrons “pump” role of the 2D MoS2nanosheets makes