Preparation and Characterization of Mesoporous TiO2 Sphere/g-C3N4 Nanosheets for Photocatalytic Behaviors

Composites consisting of mesoporous titanium dioxide spheres/graphitic carbon nitride (GCN-TiO2) were synthesized via a sol-gel and hydrothermal methods. The photocatalytic degradation of pollutants by the TiO2 spheres was evaluated based on the degradation of Rhodamine B (Rh B). In particular, the composites (GCN-TiO2) containing 7 wt% GCN exhibited excellent photocatalytic activity. Owing to the presence of GCN, the composites showed improved light absorption capability, pair lifetime, adsorption capacity, and a reduced band gap energy (from 3.12 to 2.65 eV). Further, the composites showed excellent durability and stability even after fifth cycles.