▎ 摘　　要

The interface architecture plays important role in the charge transfer and separation of S-scheme photocatalysis. Herein, we propose a strategy to synthesize (reduced graphene oxide, gamma-Fe2O3)/C3N4 S-scheme heterojunctions by thermal treatment of MIL-101(Fe) and melamine. (rGO, gamma-Fe2O3)/C3N4 presents a high oxygen evolution rate (OER) of 3.85 mmol center dot g(-1)center dot h(-1) under visible irradiation, and overall water splitting activity with the hydrogen evolution (HER) and OER rates of 23.3 and 12 mu mol center dot g(-1)center dot h(-1), respectively. The band alignments by different Fermi levels of C3N4 and (rGO, gamma-Fe2O3) result in internal electric field, which significantly enhances the separation efficiency of photogenerated electrons and holes.