High photocatalytic performance of ZnO and ZnO/CdS nanostructures against reactive blue 4 dye

Heterogeneous photocatalysis is an effective wastewater treatment technology for the removal of tissue effluents and some contaminants. Among the effective catalytic treatments, hybrid semiconductor photocatalysts have been widely applied and have received more attention in the past few decades where particles and nanocomposites (ZnO and ZnO/CdS) were prepared by hydrothermal method from raw materials, and its photocatalytic activity was studied using reactive Blue 4 dye under the influence of ultraviolet radiation. The prepared nanocomposites are characterized using various physicochemical techniques including X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), and Transmission electron microscopes (TEM) analyses. Their photodegradation results revealed that ZnO doped ZnO/CdS nanocomposites show impressive activity towards photodegradation of (Reactive Blue 4) dye. The prepared kinetic diagrams showed a pseudo-first-order interaction. The results of the dissociation efficiency of the dye solution (Reactive Blue 4) dye with the ZnO surface were greater than the surface of ZnO/CdS nanocomposite, and the rate constant was calculated for each of them.