Removal of bromate (BrO₃⁻) has gained increasing attention in drinking water treatment process. Photocatalysis technology is an effective strategy for bromate removal. During the photocatalytic reduction of bromate process, the photo-generated electrons are reductive species toward bromate reduction and photo-generated holes responsible for water oxidation. In this study, the monoclinic bismuth vanadate (BiVO₄) single crystal was developed as a visible photocatalyst for the effective removal of bromate. The as-synthesized BiVO₄ photocatalyst with optimized {010} and {110} facets ratio could achieve almost 100% removal efficiency of BrO₃⁻ driven by visible light with a first-order kinetic constant of 0.0368 min⁻¹. As demonstrated by the electron scavenger experiment and density functional theory (DFT) calculations, the exposed facets of BiVO₄ should account for the high photocatalytic reduction efficiency. Under visible light illumination, the photo-generated electron and holes were spatially transferred to {010} facets and {110} facets, respectively. The BiVO₄ single crystal photocatalyst may serve as an attractive photocatalyst by virtue of its response to the visible light, spatially charge transfer and separation as well as high photocatalytic activity, which will make the removal of BrO₃⁻ in water much easier, more economical and more sustainable.

溴酸盐的去除（BRO ₃ ^- ）已经获得了越来越多的关注饮用水处理工艺。光催化技术是去除溴酸盐的有效策略。在溴酸盐的光催化还原过程中，光生电子是朝着溴酸盐还原的还原性物质，而光生空穴是造成水氧化的原因。在这项研究中，单斜晶钒酸铋（BiVO ₄）单晶被开发为有效去除溴酸盐的可见光催化剂。所合成的BiVO ₄光催化剂具有优化的{010}和{110}小面比可以达到的BrO的几乎100％的去除效率₃ ^-由一阶动力学常数为0.0368 min ^-1的可见光驱动。如电子清除剂实验和密度泛函理论（DFT）计算所证明的，BiVO ₄的裸露面应具有较高的光催化还原效率。在可见光照射下，光生电子和空穴分别在空间上转移到{010}小平面和{110}小平面上。的BiVO ₄单晶的光催化剂可以作为一个有吸引力的光催化剂由于其对可见光的，空间电荷转移和分离以及高的光催化活性，这将使得去除的BrO的响应的₃ ^-在水中更容易，更经济更可持续。