A novel Z-scheme Bi₂MoO₆ nanosheets/TiO₂ nanosphere (BT) heterojunction in which numerous Bi₂MoO₆ nanosheets uniformly grow on the surface of TiO₂ nanospheres was synthesized through a simple two-step hydrothermal process. The resulting BT heterostructures possess high surface areas and porous structures, providing abundant active sites for photocatalysis. The “line-to-surface” synergistic effect between Bi₂MoO₆ nanosheets and TiO₂ nanospheres endow the Z-scheme heterojunction with high transfer efficiency of photogenerated carriers and increased electron lifetime for photodegradation. As a result, the as-made BT photocatalysts present superier photocatalytic performance and excellent cyclic stability for the photodegradation of 4-nitrophenol in water than pure Bi₂MoO₆ and TiO₂. The smart construction of novel Z-scheme structure in this work would afford a plausible way for designing the promising photocatalysts to address environmental matters.

通过简单的两步水热法合成了新颖的Z型Bi ₂ MoO ₆纳米片/ TiO ₂纳米球（BT）异质结，其中大量Bi ₂ MoO ₆纳米片均匀地生长在TiO ₂纳米球的表面上。所得的BT异质结构具有高的表面积和多孔结构，为光催化提供了丰富的活性位点。Bi ₂ MoO ₆纳米片和TiO ₂之间的“线对表面”协同效应纳米球赋予Z方案异质结高的光生载流子转移效率，并增加了光降解的电子寿命。结果，与纯Bi ₂ MoO ₆和TiO ₂相比，所制得的BT光催化剂对水中4-硝基苯酚的光降解表现出更高的光催化性能和优异的循环稳定性。这项工作中新型Z方案结构的智能构建将为设计有前途的光催化剂解决环境问题提供一种可行的方法。