A simple one step wet-chemical method assisted by trisodium citrate was employed in the synthesis of BiOBr applied as a photocatalyst. Photocatalytic activity of the BiOBr was investigated for the degradation of Rhodamine B (RhB) dye under visible light irradiation (λ>420 nm). The results indicated that trisodium citrate is more favorable to the formation of hierarchical architectures and reduces the particle size of BiOBr photocatalyst. BiOBr with hierarchical architectures exhibiting significantly higher catalytic activity than that with ordinary nanostructure. The significant improvement could be attributed to the high specific surface area (24.14 m 2 · −1 ), average pore sizes (34.09 nm) and average pore volume (0.24 cm 3 ·g −1 ).

中文翻译：

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柠檬酸三钠辅助合成BiOBr纳米结构催化剂在可见光下具有高效活性

在用作光催化剂的 BiOBr 的合成中，采用了一种简单的一步法湿化学法，由柠檬酸三钠辅助。研究了 BiOBr 的光催化活性在可见光照射下（λ> 420 nm）降解罗丹明 B (RhB) 染料。结果表明柠檬酸三钠更有利于分层结构的形成并降低BiOBr光催化剂的粒径。具有分级结构的 BiOBr 表现出比普通纳米结构显着更高的催化活性。显着改善可归因于高比表面积（24.14 m 2 · -1 ）、平均孔径（34.09 nm）和平均孔体积（0.24 cm 3 ·g -1 ）。