Porous CaMnO-promoted g-CN as an effective photocatalyst for tetracycline degradation.

A CaMnO/g-CN heterostructure, demonstrating promising photocatalytic performance for tetracycline (TC), was successfully synthesized using a straightforward calcination approach in this study. A series of characterization methods were employed to assess the physicochemical properties and visible-light responsiveness of the synthesized photocatalysts. The photocatalytic degradation rates of TC for the three prepared samples were evaluated. The results indicate that the CaMnO/g-CN composite exhibits the highest photocatalytic activity under visible-light irradiation, surpassing that of the individual components. Specifically, the degradation rate of CaMnO/g-CN is 0.031 min, which is 2.07 and 2.82 times greater than that of the pristine g-CN and CaMnO, respectively. Our findings highlight the significant potential of eco-friendly perovskites in developing visible-light-activated g-CN-based heterostructures for practical photocatalytic applications.