Partial Cu ion exchange induced triangle hexagonal Mn0.45Cu0.05Cd0.5S nanocrystals for enhanced photocatalytic hydrogen evolution.

High crystallinity triangle hexagonal Mn0.45Cu0.05Cd0.5S was obtained by partial Cu ion exchange treatment on colloidal pristine Mn0.5Cd0.5S nanorods. The Mn0.45Cu0.05Cd0.5S nanotriangles exhibited a high hydrogen yield of 147 921 µmol g-1 h-1 under visible light irradiation, about 7.4 times higher than that of pristine Mn0.5Cd0.5S.