Construction of NiS/MnCdS S-scheme heterojunction for efficient photocatalytic overall water splitting: Regulation of surface sulfur vacancy and energy band structure

In this work, an S-scheme NiS/MnCdS-Vs heterojunction with abundant surface sulfur vacancies was synthesized by electrostatic self-assembly method for effective photocatalytic hydrogen evolution and photocatalytic overall water splitting. The optimal photocatalytic hydrogen production rate of NiS/MnCdS-Vs-3 reached 4099.55 μmol/h g−1. More importantly, excellent and stable photocatalytic overall water splitting activity for H2 and O2 evolution was obtained on the NiS/MnCdS-Vs-3 heterojunction with 1% Pt and 5% Co3O4 nanorods as cocatalysts.