The term "photocatalysis" was first used in a scientific publication in 1911, when dyes were bleached using ZnO as a photocatalyst. TiO2, which was known as a benchmark photocatalyst for decades due to its ideal band edge placement, high stability, broadband gap, and comparatively inexpensive cost, was discovered by Fujishima and Honda, and their discovery brought about a revolution in the field of photocatalysts. Other applications for ZnO include electronics, photonics, spintronics, cancer treatment, energy, and the environment. [26-28] Due to its multifunctional characteristics, ZnO has a wide range of applications . As compared to TiO2, ZnO has a higher photocatalytic efficiency because of its direct wide bandgap and high exciton binding energy (60 MeV). ZnO has a significant band-gap energy of about 3.3 eV and is inexpensive, effective, and non-toxic. However, due to its very high charge carrier recombination, it cannot be used in large photocatalytic processes .