As the world faces serious environmental pollution and energy shortage, developing Vis-light-driven photocatalysts for water splitting is highly attractive in clean energy utilization. Fabricating heterostructures has been proposed to be an efficient system to enhance the photocatalytic activity. However, synthesizing heterostructures with good contact and understanding charge transfer dynamics are still unresolved issues. In this work, a facile calcination approach was used to synthesize red phosphorus (RP) nanostructures/TiO₂ heterostructured composites. The RP nanostructures were directly grown on the TiO₂ nanoparticles with an intimate surface contact. By adjusting the molar ratio of amorphous RP to TiO₂ and the synthesizing temperature, thin nanorod-like RP nanostructures with a large exposed surface and a good surface contacting with TiO₂ were obtained. The synergetic effect of heterostructured RP/TiO₂ composites leads to an enhanced charge separation and transfer, and a better utilization of visible-light. As expected, the RP/TiO₂-700 °C composites exhibit good photocatalytic activity of degrading RhB and the optimal H₂ evolution rate. This work not only provides a method to prepare earth abundant elemental phosphorus well-contacted heterostructures, expand the well-known UV-active TiO₂ photocatalyst to visible active, but also deepens understanding of charge transfer dynamics in heterostructured photocatalyst.

随着世界面临严重的环境污染和能源短缺，开发用于光分解水的可见光驱动的光催化剂在清洁能源利用方面极具吸引力。已经提出制造异质结构是增强光催化活性的有效系统。然而，合成具有良好接触并了解电荷转移动力学的异质结构仍未解决。在这项工作中，使用简便的煅烧方法来合成红磷（RP）纳米结构/ TiO ₂异质结构复合材料。RP纳米结构直接在TiO ₂纳米颗粒上生长，并具有紧密的表面接触。通过调节无定形RP与TiO ₂的摩尔比并得到了合成温度高，暴露面大，与TiO ₂接触良好的细纳米棒状RP纳米结构。异质结构RP / TiO ₂复合材料的协同作用导致电荷分离和转移增强，可见光利用率更高。如所预期的，RP / TiO ₂ -700°C复合材料表现出良好的降解RhB的光催化活性和最佳的H ₂释放速率。这项工作不仅提供了一种制备地球上丰富的元素磷良好接触的异质结构，扩展众所周知的紫外线活性TiO _{2的方法。} 光催化剂的可见活性，但也加深了对异质结构光催化剂中电荷转移动力学的理解。