Herein, microtubular nanoporous g-C₃N₄ (TPCN) with hierarchical structure and nitrogen defects was prepared via a facile self-templating approach. On one hand, the hexagonal tubular structure can facilitate the light reflection/scattering, provide internal/external active sites, and endow the electron with oriented transfer channels. The well-developed nanoporosity can result in large specific surface area and abundant accessible channels for charge migration. On the other hand, the existence of nitrogen vacancies can improve the light harvesting (λ > 450 nm) and prompt charge separation by acting as the shallow charge traps. More NH_x groups in g-C₃N₄ framework can promote the interlayer charge transport by generating hydrogen-bonding interaction between C₃N₄ layers. Therefore, TPCN possessed highly efficient visible photocatalytic performances to effectively inactivate Escherichia coli (E. coli) cells and thoroughly mineralize organic pollutants. TPCN with the optimum bactericidal efficiency can completely inactivated 5 × 10⁶ cfu mL⁻¹ of E. coli cells after 4 h of irradiation treatment, while about 74.4 % of E. coli cells were killed by bulk g-C₃N₄ (BCN). Meanwhile, the photodegradation rate of TPCN towards methylene blue, amaranth, and bisphenol A were almost 3.1, 2.5 and 1.6 times as fast as those of BCN. Furthermore, h⁺ and •O₂⁻ were the reactive species in the photocatalytic process of TPCN system.

本文中，通过一种简便的自模板方法制备了具有分级结构和氮缺陷的微管纳米多孔gC ₃ N ₄（TPCN）。一方面，六角形管状结构可以促进光的反射/散射，提供内部/外部的活性部位，并使电子具有定向的传输通道。发达的纳米孔隙可以导致较大的比表面积和丰富的电荷迁移通道。另一方面，氮空位的存在可以改善光的收集（λ > 450 nm）并通过充当浅电荷陷阱来促进电荷分离。gC ₃ N _4中有更多NH _x基团骨架可通过在C ₃ N ₄层之间产生氢键相互作用来促进层间电荷传输。因此，TPCN具有高效的可见光催化性能，可以有效地灭活大肠杆菌（E. coli）细胞并彻底矿化有机污染物。具有最佳杀菌效率的TPCN可以在辐射处理4小时后完全灭活5×10 ⁶ cfu mL ^-1的大肠杆菌细胞，而约74.4％的大肠杆菌细胞被大量gC ₃ N ₄杀死。（BCN）。同时，TPCN对亚甲基蓝，a菜红和双酚A的光降解速率几乎是BCN的3.1、2.5和1.6倍。此外，H ⁺和•Ø ₂ ^-均TPCN系统的光催化处理的反应性物质。