Fig. 6
a The relative concentration (Ct/C0) of MO versus time under light irradiation in the absence and presence of various photocatalysts: ZnO, Cu2O (pH 10, 20 min), CuSCN (3D), NiO (1 min), Cu2O (pH 10, 20 min)/ZnO, ZnO/CuSCN (3D), and ZnO/NiO(1 min); b The UV-vis absorption spectra of MO aqueous solution with different photocatalysts: ZnO, Cu2O (pH 10, 20 min), CuSCN (3D), NiO (1 min), Cu2O (pH 10, 20 min)/ZnO, ZnO/CuSCN (3D), and ZnO/NiO(1 min)