Flower-Like BiOCl/g-C3N4 Hybrid with Oxygen Vacancies Assembled by Nanosheets: In Situ Pyrolysis Associated with Ultrasonic Process and Photocatalytic Properties

Herein, a method is described for pyrolysis associated with in situ ultrasonic synthesis of flower-like p-n -type BiOCl/g-C 3 N 4 assembled with nanosheets for enhancing the visible-light degradation of Rhodamine B (RhB). The formation process, structure, microscopic morphology, and photocatalytic activity of the samples were investigated in detail. In addition, the results of simulated visible light-driven photocatalytic experiments showed that, compared with pure g-C 3 N 4 , the BiOCl (20 wt %)/g-C 3 N 4 composite photocatalyst exhibited better degradation ability with a maximum k value of 0.109 min −1 , and the most significant total removal rate of RhB was up to 99 %, which is about ninefold in comparison with pure g-C 3 N 4 . Finally, the enhanced photocatalytic activities of the products could be attributed to the suitable band structures between the BiOCl/g-C 3 N 4 composite with rich oxygen vacancies for the effective separation of photogenerated electron–hole pairs.