ZnS and ZnS/ZnO assembly for photocatalytic removal of Reactive Red ۶۶

The current work investigated the effect of ZnS and ZnS/ZnO assembly on the photocatalytic removal of Reactive Red ۶۶ from an aqueous solution. The photocatalytic activities were carried out using both UV irradiation and visible light, and the effects of various operating parameters, such as pH, catalyst loading, dye concentration, and contact time, were studied. The results showed that the ZnS/ZnO heterostructure exhibited a higher dye removal percentage than ZnS alone and assisted in the photodegradation of Reactive Red ۶۶. Maximum adsorption was found at pH ۲ and ۵, indicating that the dye removal was strongly pH-dependent. The highest dye removal efficiency under UV light was ۷۷.۷ and ۹۱.۷% using ZnS and ZnS/ZnO, respectively. Furthermore, the degradation percentage of Reactive Red ۶۶ by ZnS and ZnS/ZnO decreased to ۴۳.۳ and ۷۵.۲% under visible light. The enhanced photocatalytic activity of the ZnS/ZnO heterostructure is attributed to its high absorption of light, efficient separation of electron-hole pairs, and quick surface reaction in the heterostructure.

کلیدواژه ها:

ZnS ، ZnS/ZnO heterostructure ، Reactive Red ۶۶ ، Photocatalytic degradation