The contamination of water resources by organic pollutants presents significant environmental and health challenges. Therefore, it is urgent to develop highly efficient and green approach for treating organic water pollutants. Bismuth oxybromide (BiOBr) has gained attention due to its high photoactivity. In this work, we report a modification to improve its photocatalytic activity. BiOBr were prepared using a capping agent, benzene-1,3,5-tricarboxylic acid, to tune the morphology of the compound. The resulting BiOBr shows nanosheet morphology, which provides a high surface-to-volume ratio and a larger conduction band compared to bulk BiOBr. As a result, the BiOBr nanosheets show the highest efficiency for photodegradation of Rhodamine B, compared to benchmark TiO₂ and bulk BiOBr catalysts.

中文翻译：

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羟溴化铋纳米片作为染料降解的高效光催化剂


有机污染物对水资源的污染带来了重大的环境和健康挑战。因此，迫切需要开发高效和绿色的方法来处理有机水污染物。羟溴化铋 （BiOBr） 因其高光活性而受到关注。在这项工作中，我们报道了一种提高其光催化活性的修饰。使用封端剂苯-1,3,5-三羧酸制备 BiOBr，以调节化合物的形态。所得的 BiOBr 显示出纳米片形态，与块体 BiOBr 相比，纳米片具有较高的表面体积比和更大的导带。因此，与基准 TiO₂ 和块状 BiOBr 催化剂相比，BiOBr 纳米片对罗丹明 B 的光降解效率最高。