Preparation of 1T-MoS2 quantum dots modified flower-like BiOBr nanocomposites for photocatalytic molecular oxygen aviation

The crucial oxidant in photocatalytic degradation of dye is the photogenerated reactive oxygen species (ROS) but many photocatalytic processes suffer from low ROS generation efficiency. In this paper, 1T-MoS 2 quantum dot modified flower-like BiOBr nanocomposites were synthesized to forming a Type-II heterojunction. As-prepared 1T-MoS 2 @BiOB composites showing excellent activity for degradation of rhodamine B (RhB) under visible light, BiOBr loaded with 0.2wt% 1T-MoS 2 quantum dots has achieved 96.9% efficiency within 18 min. Such outstanding photocatalytic activity is attributed to the flower-like structure and heterojunction between 1 T-MoS 2 and BiOBr which provide a fast transfer pathway for excitons and promote the activation of molecular oxygen. In addition, a possible catalytic mechanism was proposed. This work will provide new insight for design and fabrication of cheaper and more effective photocatalysts for molecular oxygen activation in environmental remediation.