ZnO, CuO and the ZnO/CuO heterojunction were prepared using zin acetate and copper
acetate by sol-gel method. The materials were characterized by: TGA, XRD, XPS, SEM,
TEM, EDS and UV-Vis. The heterostructure showed a synergistic effect compared to pure
materials. The XPS results confirm the existence of a heterostructure. The morphology is a
combination of characteristic morphologies of ZnO and CuO. The bandgap of ZnO
decreases with the incorporation of CuO. The photocatalytic efficiency of the
heterostructure increases; the degradation percentages were better for the heterostructures
in both radiations: Ultraviolet and Visible.