Fig. 2From: Hierarchical Heterostructure of ZnO@TiO2 Hollow Spheres for Highly Efficient Photocatalytic Hydrogen Evolution a TEM, b magnified TEM, and c STEM images of ZnO@TiO2 hollow spheres; Corresponding EDS elemental mappings of c indicating the uniform distribution of d Ti, e Zn, and f O, respectivelyBack to article page