One-pot synthesis of Bi24O31Br10/Bi4V2O11 heterostructures and their photocatalytic properties
Bi24O31Br10/Bi4V2O11 heterojunction photocatalysts were successfully prepared by a facile, one-pot solvothermal method. In the obtained heterojunctions, Bi4V2O11 nanoparticles were uniformly immobilized on or inlaid onto the surfaces of the Bi24O31Br10 nanosheets. They exhibited superior visible light photocatalytic activity towards the degradation of rhodamine B (RhB). Among them, the 25% Bi4V2O11 sample possessed the highest photocatalytic activity, the degradation rate of which was 4 and 6 times as fast as that of bare Bi24O31Br10 and Bi4V2O11, respectively. The enhanced photocatalytic activity could be attributed to the effective separation and transfer of photogenerated carriers. The trapping experiments confirmed that the photogenerated holes and ˙O2− radicals were the main active species responsible for the photodegradation of RhB.