Twin S‐Scheme Heterojunction ZnO/UiO‐66‐NH 2 @ZnIn 2 S 4 Rhombic Octahedra for Efficient Photocatalytic H 2 Evolution

Abstract Amid increasing fossil energy scarcity, a key solution is using solar energy to split water into hydrogen (H 2 ). However, single photocatalysts face limitations of low solar utilization rate and rapid carrier recombination, so constructing novel composite photocatalysts is a promising solution. Here, a novel ZnO/UiO‐66‐NH 2 @ZnIn 2 S 4 (ZUN@ZIS) composite catalyst with twin S‐scheme heterojunction is constructed for the first time, in which ZnIn 2 S 4 (ZIS) nanosheets are grown in situ on the surface of ZnO/UiO‐66‐NH 2 (ZUN) rhombic octahedra. Under the irradiation of visible light and without the help of any co‐catalyst, the H 2 evolution rate of the prepared ZUN@ZIS‐20 is 5.05 mmol g −1 h −1 ,…