CdS and Ag synergistically improved the performance of g-C3N4 on visible-light photocatalytic degradation of pollution

CdS-AgO@g-C3N4 nanocomposites were successfully synthesized and characterized by XRD, N-2 physical adsorption, XPS, SEM, TEM, EDX, and UV-Vis DRS (various technical means). The adsorption light range of as-prepared materials could extend to the whole visible light region with the addition of Ag. Silver can act as a bridge to facilitate the separation of electrons and holes, thereby greatly enhancing the photocatalytic activity of CdS-AgO@g-C3N4, enabling the maximum degradation efficiency of salicylic acid in water to reach 92.8% under visible light. Peroxy radical is the most important radical in the photocatalytic reaction process, followed by electron and hole, while hydroxyl radical has almost no effect. In addition, the mechanism of photocatalytic process was also explored.

Automated summary

CdS-AgO@g-C3N4 nanocomposites with enhanced photocatalytic activity were synthesized by incorporating silver, which acted as a bridge to facilitate the separation of electrons and holes, leading to a high degradation efficiency of salicylic acid in water under visible light. Peroxy radical was found to be the most important radical in the photocatalytic process.