Herein, an efficient CoSx/Twinned-Cd0.5Zn0.5S (CoSx/T-CZS) photocatalyst was successfully constructed by an in-situ deposition method. Notably, the establishment of zinc blende/wurtzite (ZB/WZ) homojunction in T-CZS and heterojunction between CoSx and T-CZS...