Element doping and nanostructure forming remain the effective means to improve the visible-light driven photocatalytic performance for graphitic carbon nitride (CN). Herein, Na/Cl doped g-C₃N₄ with tetragonal microtube structure is successfully prepared by a hydrothermal method using melamine and sodium chloride as precursors. Nanostructure formation increases the specific surface area of the 3wt% NaCl-CN photocatalyst to 76.8 m²/g from 25.8 m²/g of CN. The Na/Cl doping reduces the band gap and effectively improves separation and transport of photoinduced carriers. The photocatalytic hydrogen evolution rate of 3wt% NaCl-CN reaches 4.95 μmol/h, which is about 4.3 times as high as that of CN. Not only does the more specific surface area increase, and the visible light harvesting increase, but also the photoinduced carriers become more effectively separated and transported, facilitating the photocatalytic performance by the synergistic effect of element doping and nanostructure forming.

元素掺杂和纳米结构形成仍然是改善可见光驱动的石墨氮化碳（CN）光催化性能的有效手段。本文以三聚氰胺和氯化钠为前驱体，通过水热法成功制备了具有四方微管结构的Na / Cl掺杂gC ₃ N ₄。纳米结构的形成将3wt％NaCl-CN光催化剂的比表面积从25.8 m ²增加到76.8 m ² / g/ g CN。Na / Cl掺杂减少了带隙，并有效地改善了光诱导载流子的分离和传输。3wt％NaCl-CN的光催化放氢速率达到4.95μmol/ h，约为CN的4.3倍。不仅比表面积增加，可见光收集增加，而且光诱导的载体变得更有效地分离和运输，通过元素掺杂和纳米结构形成的协同作用促进光催化性能。