“…The reason for their use in a large number of applications is due to their enhanced catalytic, optical, and electronic properties at the nano level. Nanoscale transition metal oxides are considered the most promising catalysts for wastewater treatment in a simple, reliable, fast, and environmentally friendly way considering their high photocatalytic activity, excellent solubility, and stability [17][18][19][20][21][22]. Among them, zinc oxide (ZnO) stands out especially.…”