Herein, we report the synthesis of novel narrow band gap phosphorus sulfide quantum dots (PSQDs)-modified bismuth oxybromide (Bi 24 O 31 Br 10 ) heterojunction (noted as BOB/PS) for the highly efficient photo-degradation of hazardous organic pollutants including rhodamine B (RhB), methyl orange (MO), and malachite green (MG). Such a high photocatalytic activity of BOB/PSQDs heterojunction derives from the improved visible-light response capacity, high surface area/pore volume, and suitable band structure for efficient electron transfer to generate reactive oxygen species (ROS). ROS trapping experiments demonstrate that hydroxy ( * OH) and superoxide radicals ( * O 2 À ) play important roles in the photo-degradation. A possible S-scheme mechanism for the enhanced photocatalytic activity of BOB/PS is proposed.
Herein, we report a novel narrow band gap sulfur quantum dots (SQDs)-modified BiOCl heterojunction (BOC/SQDs) for the photo-degradation of hazardous organic pollutants via rhodamine B (RhB)-sensitization. Such a high photocatalytic activity of RhB-sensitized BOC/SQDs heterojunction derives not only from the improved visible-light response capacity, high surface area/pore volume, suitable band structure for efficient electron transfer, but also from the surge of the number of electrons via RhB-sensitization for reactive oxygen species (ROS) generation.Superoxide radicals ( * O 2 À ), holes (h + ), and hydrogen peroxide (H 2 O 2 ) play the important roles in the photo-degradation. A possible mechanism for RhB-sensitization enhanced degradation performance for treating organic pollutants by BOC/SQDs is proposed. The combination of dye-sensitization with BOC/ SQDs heterojunction can explore a greener, energy saving, and efficient photo-induced nanoplatform for treating organic pollutants in aqueous media.
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