Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Kaifu District, Changsha 410022, Hunan Province, P. R. China.
J Nanosci Nanotechnol. 2020 Apr 1;20(4):2267-2276. doi: 10.1166/jnn.2020.17331.
Two-dimensional (2D) BiOBr nanosheets (NSs) have attracted considerable interest as photocatalysts. The surface active sites of BiOBr NSs are crucial in determining the photocatalytic performance of these materials under visible light. The modification of the surface state of BiOBr NSs with multiple charged groups has been scarcely studied as a way to increase the number of surface active sites and the corresponding photocatalytic activity. Herein, vanadate-rich 2D BiOBr/Bi NSs were fabricated without adding strong reductants and subsequently used for visible-light-driven photocatalysis. Even under reductant-free condition, we were able to simultaneously deposit Bi and vanadate groups on the surface of pristine BiOBr NSs. The corresponding formation mechanism was also explored in a subsequent step. Compared to pristine BiOBr NSs and BiOBr/Bi NSs, the vanadate-rich BiOBr/Bi NSs prepared herein exhibited superior adsorption and enhanced photodegradation of Rhodamine B (RhB) under visible light illumination.
二维（2D）BiOBr 纳米片（NSs）作为光催化剂引起了相当大的兴趣。BiOBr NSs 的表面活性位点对于这些材料在可见光下的光催化性能至关重要。然而，用多种带电基团修饰 BiOBr NSs 的表面状态以增加表面活性位点的数量和相应的光催化活性的研究还很少。在此，我们在不添加强还原剂的情况下制备了富含钒的 2D BiOBr/Bi NSs，并随后将其用于可见光驱动的光催化。即使在没有还原剂的条件下，我们也能够将 Bi 和钒基团同时沉积在原始 BiOBr NSs 的表面上。随后还探索了相应的形成机制。与原始的 BiOBr NSs 和 BiOBr/Bi NSs 相比，本文制备的富含钒的 BiOBr/Bi NSs 在可见光照射下表现出更好的 Rhodamine B（RhB）吸附和增强光降解性能。
