Schottky-structured 0D/2D composites via electrostatic self-assembly for efficient photocatalytic hydrogen evolution

Semiconductor-metal heterostructure, especially represented by various inorganic semiconductors-platinum (Pt) hybrids, is widely applied in converting solar power to chemical energy. Given the scarcity of Pt and the availability of coupling, the development of a non-Pt regimen and facile assembly strategy is critical. In this study, CdxZn1-xS/Ti3C2 ultrathin MXene composites were availably prepared with a facile electrostatic assembly strategy. The unique 0D/2D assembly demonstrated remarkably enhanced performance toward photocatalytic hydrogen production compared with bare CdxZn1-xS. Spectroscopic characterization analysis and band theory discussion substantiated the effects of electronic interaction and the Schottky barrier arising from intimate contact of CdxZn1-xS and Ti3C2 MXene on the swift separation of photoinduced electron-hole pairs. Successful application of electrostatic self-assembled CdxZn1-xS with ultrathin MXene opens a new area of utilizing electrical difference and band theory to prepare rational semiconductor/MXene Schottky structure towards various photocatalytic reactions.

Automated summary

In this study, CdxZn1-xS/Ti3C2 ultrathin MXene composites were successfully prepared with a facile electrostatic assembly strategy, showing significantly enhanced performance for photocatalytic hydrogen production. Spectroscopic characterization analysis and band theory discussion substantiated the effects of electronic interaction and the Schottky barrier on swift separation of photoinduced electron-hole pairs.