S-scheme heterojunction photocatalysts: Mechanism, challenges and opportunities

S-scheme heterojunction photocatalysts hold great promise in sustainable energy production for attractive solar to chemical conversion efficiencies based on designable semiconductor heterostructures. In the past decades, S-scheme heterojunctions were widely investigated in the development of various solar fuels. Conventionally, the concern was mainly focused on the effects of band structure alignment in dealing with the formation mechanisms of S-scheme heterojunction photocatalysts. In this review, more attentions are paid to the effects of light absorption ability, interfacial recombination centers, selective interface contact, and ferroelectric polarization on the formation of S-scheme heterojunctions. And…