Strong interfacial electric field can promote the separation and transfer of photogenerated carriers of photocatalysts. Herein, a three-dimensional (3D) network structure assembled from carbon-coated C₃N₄ nanowires (denoted as 3D C₃N₄@C) with a giant interfacial electric field was prepared. The unique 3D structure works with the carbon layer to expand the light absorption range of C₃N₄ to the full spectrum. Under visible-light irradiation (λ ≥ 420 nm), the degradation rate constants of 3D C₃N₄@C for bisphenol A and phenol were 41.2 and 5.7 times that of bulk g-C₃N₄, respectively. Meanwhile, the interfacial electric field of 3D C₃N₄@C-2 mol/L was 5.14 times that of bulk g-C₃N₄. The charge transfer process of 3D C₃N₄@C was confirmed by synchronous illumination X-ray photoelectron spectroscopy and DFT. The significantly improved activity was mainly ascribed to the giant interfacial electric field between g-C₃N₄ and the carbon layer, which significantly promoted the separation and transportation of photo-generated charge carriers.

强界面电场可以促进光催化剂光生载流子的分离和转移。在此，制备了由具有巨大界面电场的碳涂层C ₃ N ₄纳米线（表示为3D C ₃ N ₄ @C）组装而成的三维（3D）网络结构。独特的 3D 结构与碳层一起将 C ₃ N ₄的光吸收范围扩大到全光谱。在可见光照射下（λ≥420 nm），3D C ₃ N ₄ @C对双酚A和苯酚的降解速率常数分别是体gC ₃ N _{4的41.2和5.7倍}， 分别。_{同时，3D C 3} N ₄ @C-2 mol/L的界面电场是体gC ₃ N ₄的5.14倍。通过同步照射X射线光电子能谱和DFT证实了3D C ₃ N ₄ @C的电荷转移过程。_{显着提高的活性主要归因于gC 3} N ₄与碳层之间的巨大界面电场，显着促进了光生电荷载流子的分离和传输。