Fig. 4From: Fabrication of Hierarchical ZnO@NiO Core–Shell Heterostructures for Improved Photocatalytic PerformanceTypical energy dispersive X-ray spectroscopy (EDS) elemental mapping images of ZN2. a The corresponding SEM image of the mapping area. b O mapping. c Zn mapping. d Ni mapping. e EDS imagesBack to article page