The AgI/Bi₂MoO₆/AgBi(MoO₄)₂ (ABM) multi-heterostructure nanosheet composite system for visible-light photocatalysis have been successfully constructed by a simple one-step calcination method. The ABM multi-heterostructure composite photocatalysts exhibited the obviously improved photocatalytic performance than the pristine Bi₂MoO₆, AgBi(MoO₄)₂, and AgI for the degradation of both Tetracycline hydrochloride (TC) and Rhodamine B (RhB). The apparent degradation rate for the ABM sample with the highest photocatalytic activity is 5.4 (TC) and 23.4 times (RhB) that of Bi₂MoO₆, 4.0 (TC) and 4.9 times (RhB) that of AgBi(MoO₄)₂, and 1.9 (TC) and 2.4 times (RhB) that of AgI, respectively. This ABM sample with the highest activity showed a Bi₂MoO₆/AgBi(MoO₄)₂ composite nanosheet morphology (lateral size: 1–5 u m, thickness: 90−130 nm) with a large amounts of small AgI nanocrystals (diameter: 2−25 nm) uniformly distributed on the surface of composite sheet. The outstanding performance of the ABM composite photocatalysts should be ascribed to the effective separation of photoinduced electron-hole pairs via the multi-heterostructure in ABM, the enhanced visible-light absorption, as well as the two-dimensional (2D) morphology benefitting to the exposure of plenty of surface reactive sites and significant reduction of migration distances of photogenerated carriers. It is hoped that this facile method for the fabrication of multi-heterostructure in our work could promote and inspire the other multicomponent functional nanomaterials used in the fields of not only photocatalysis, but also solar cells, sensors, catalysis, and so on, in the future.

通过简单的一步煅烧方法成功构建了用于可见光光催化的AgI / Bi ₂ MoO ₆ / AgBi（MoO ₄）₂（ABM）多异质结构纳米片复合系统。对于原始的Bi ₂ MoO ₆，AgBi（MoO ₄）₂和AgI，ABM多异质结构复合光催化剂对四环素盐酸盐（TC）和若丹明B（RhB）的降解均表现出明显的改善。具有最高光催化活性的ABM样品的表观降解速率是Bi ₂ MoO _6的5.4（TC）和23.4倍（RhB）。分别是AgBi（MoO ₄）_2的4.0（TC）和4.9倍（RhB），和AgI的1.9（TC）和2.4倍（RhB）。该具有最高活性的ABM样品显示出Bi ₂ MoO ₆ / AgBi（MoO ₄）₂复合纳米片的形态（横向尺寸：1-5 µm，厚度：90-130 nm），并且大量小的AgI纳米晶体（直径：2-25 nm）均匀分布在复合片的表面。ABM复合光催化剂的出色性能应归因于通过ABM中的多异质结构有效分离光诱导的电子-空穴对，增强了可见光吸收，以及有益于分离的二维（2D）形态。大量表面反应位点的暴露，显着减少了光生载流子的迁移距离。希望我们的工作中这种用于制造多异质结构的简便方法能够促进和启发不仅用于光催化领域，而且用于太阳能电池，传感器，