Photocatalysis is considered to be a clean, green and efficient method to purify water. In this report, we first developed a highly efficient ultrafine TiO₂ nanorods/g-C₃N₄ nanosheets (TiO₂ NR/CN NS) composites via a simple hydrothermal method. Tiny TiO₂ nanorods (diameter: ∼1.5 nm and length: ∼8.3 nm) were first loaded in situ on the CN NS by adding graphitic carbon nitride (g-C₃N₄) to the reaction solution. The TiO₂ NR/CN NS composites present high charge separation efficiency and broader light absorbance than P25 TiO₂. Furthermore, we illustrate that the TiO₂ NR/CN NS catalyst possesses high performance for the photocatalytic degradation of the common and stubborn pollutants in water, such as the rhodamine B (RhB) dye and phenol. Under visible light (λ > 420 nm) irradiation, the apparent rate of the TiO₂ NR/CN NR is 172 and 41 times higher than that of the P25 TiO₂ and TiO₂ NR, respectively. Additionally, we speculated that the heterojunction formed between TiO₂ NR and CN NS, which is the basis for the experiments we have designed and the corresponding results. We demonstrated that reactive oxidative species such as superoxide anion radical and holes play critical roles in the degradation, and the hydroxyl radical contributes nothing to the degradation.

光催化被认为是一种清洁、绿色、高效的水净化方法。在本报告中，我们首先通过简单的水热法开发了一种高效的超细TiO ₂纳米棒/gC ₃ N ₄纳米片（TiO _{2 NR/CN NS）复合材料。}通过向反应溶液中添加石墨碳氮化物 (gC ₃ N ₄ )，首先将微小的 TiO ₂纳米棒（直径：~1.5 nm，长度：~8.3 nm）原位加载到 CN NS 上。_{与P25 TiO 2}相比，TiO ₂ NR/CN NS 复合材料具有高电荷分离效率和更宽的吸光度。此外，我们还说明了 TiO ₂NR/CN NS 催化剂具有光催化降解水中常见和顽固污染物的高性能，如罗丹明 B (RhB) 染料和苯酚。在可见光（λ  >420 nm）照射下，TiO _{2 NR/CN NR的表观速率分别是P25 TiO 2}和TiO ₂ NR的172倍和41倍。此外，我们推测TiO ₂ NR和CN NS之间形成了异质结，这是我们设计实验和相应结果的基础。我们证明了活性氧化物质，如超氧阴离子自由基和空穴在降解中起着关键作用，而羟基自由基对降解没有任何贡献。