Fig. 7 (a) H2 evolution activity of ZCS, ZCS/CoP, ZCS/Co3O4 QDs and O/ZCS/P; (b) H2 evolution activity of ZCS/CoP-x; (c) H2 evolution activity of O/ZCS/P-x; (d) H2 evolution activity of O/ZCS/P-3 under different light sources; (e) H2 evolution activity of O/ZCS/P-3 under different wavelength (1 h); (f) Photocatalytic H2evolution stability testing of O/ZCS/P-3.