Fig. 7From: Fabrication of Hierarchical ZnO@NiO Core–Shell Heterostructures for Improved Photocatalytic Performancea Plots of relative concentration (C/C0) of RhB versus time for the degradation of RhB over ZN1, ZN2, ZN3, and ZnO nanorods and NiO nanosheets under UV light irradiation. b Corresponding plots of − ln(Ct/C0) versus irradiation time. c Plots of relative concentration (C/C0) of MO versus time for the degradation of MO over ZnO, NiO, and ZnO@NiO heterostructure under UV irradiation. d Repeated photocatalytic degradation of RhB over ZN2Back to article page