A hollow tubular graphitic carbon nitride (g-C₃N₄) with nitrogen vacancy was successfully prepared via simple hydrothermal calcination method. The hollow tubular structure has the functions of increasing the specific surface area, promoting the multiple scattering effect of light, as well as imparting the directional transfer of electrons. Simultaneously, the introduction of vacancy defect can manipulate the electronic structure of g-C₃N₄ with narrow band-gap and excellent charge carrier behavior. The catalytic activity of the photocatalysts were evaluated by the degradation reaction of chlortetracycline hydrochloride (CTC·HCl) and hydrogen evolution reaction (HER). The results indicated that the photocatalytic property of the resulting g-C₃N₄ tube with appropriate nitrogen vacancy was significantly better than that of original g-C₃N₄. Under visible light irradiation, ND-TCN-10 demonstrated the optimal photocatalytic degradation effect and achieved a hydrogen generation rate of 235.68 μmol g^-1 h^-1. In addition, based on the liquid chromatography-mass spectrometry (LC-MS), the main by-products of CTC·HCl and the possible degradation pathways were analyzed. The method of introducing nitrogen deficiency into the tubular structure provides a promising strategy for increasing the photocatalytic activity of g-C₃N₄-based materials.

通过简单的水热煅烧方法成功地制备了具有氮空位的中空管状石墨碳氮化物（gC ₃ N ₄）。中空管状结构具有增加比表面积，促进光的多重散射作用以及赋予电子定向转移的功能。同时，空位缺陷的引入可以操纵gC ₃ N ₄的电子结构具有窄的带隙和出色的电荷载流子性能。通过盐酸金霉素（CTC·HCl）的降解反应和放氢反应（HER）评估了光催化剂的催化活性。结果表明，具有适当氮空位的所得gC ₃ N ₄管的光催化性能明显优于原始gC ₃ N ₄。在可见光照射下，ND-TCN-10表现出最佳的光催化降解效果，并且制氢速率为235.68μmolg ^-1 h ^-1。此外，基于液相色谱-质谱法（LC-MS），分析了四氯化碳·盐酸的主要副产物和可能的降解途径。将氮缺乏引入管状结构的方法为增加基于gC ₃ N ₄的材料的光催化活性提供了有希望的策略。