Designing carbonaceous materials modified g-C₃N₄-based photocatalytic system with broadband solar absorption from the visible to near-infrared (NIR) region for photocatalytic H₂ evolution (PHE) remains a big challenge. Herein, urea formaldehyde resin-carbonized nitrogen doped carbon (UFR-NC) ribbons modified g-C₃N₄ nanosheets were prepared by a facile thermal treatment method. Experimental results imply that g-C₃N₄/UFR-NC composites not only show larger specific surface area (SSA), better crystallinity and outstanding stability but also exhibit faster separation of charge carriers, in which the UFR-NC ribbons are more apt to accept electrons. Additionally, g-C₃N₄/UFR-NC composites possess superior optical adsorption from visible to NIR light and the band gap can be easily adjusted by changing the content of UFR-NC ribbons. Surprisingly, g-C₃N₄/UFR-NC_0.02 exhibits the highest PHE activity (84.32 µmol h⁻¹), which is over 54.75 and 6.51 times higher than that of the g-C₃N₄ obtained by direct calcination of melamine (g-C₃N₄-M) and direct calcination of urea (g-C₃N₄-U) under visible light, and the apparent quantum efficiency (AQE) reaches 6.2% at 420 nm. In addition, the g-C₃N₄/UFR-NC_0.02 displays an enhanced PHE activity of 26.59 µmol h⁻¹ and 0.45 µmol h⁻¹ under the blue visible (λ = 475 nm) and NIR light irradiation (λ > 800 nm). And the PHE activity of g-C₃N₄/UFR-NC_0.02 has no obvious change after fourteen runs within 70 h. Our results suggest that constructing carbonaceous materials modified g-C₃N₄-based photocatalytic system will be a promising strategy to PHE.

设计碳质材料修饰的基于gC ₃ N ₄的光催化系统，该系统具有从可见光到近红外（NIR）区域的宽带太阳能吸收，以进行光催化H ₂释放（PHE）。在此，通过简便的热处理方法制备了脲醛树脂碳化的氮掺杂碳（UFR-NC）带改性的gC ₃ N ₄纳米片。实验结果表明，gC ₃ N ₄/ UFR-NC复合材料不仅显示出更大的比表面积（SSA），更好的结晶度和出色的稳定性，而且还表现出更快的电荷载流子分离，其中UFR-NC带更易于接受电子。另外，gC ₃ N ₄ / UFR-NC复合材料具有从可见光到NIR的优异光学吸附能力，并且可以通过改变UFR-NC带的含量轻松调节带隙。出乎意料的是，gC ₃ N ₄ / UFR-NC _0.02表现出最高的PHE活性（84.32 µmol h ^-1），比通过直接煅烧三聚氰胺（gC _3）获得的gC ₃ N ₄高出54.75和6.51倍。N ₄ -M）和尿素的直接煅烧（gC ₃ N ₄ -U）在可见光下，表观量子效率（AQE）在420 nm时达到6.2％。另外，gC ₃ N ₄ / UFR-NC _0.02在蓝色可见光（λ= 475 nm）和近红外光照射（λ> 800 nm）下显示出增强的PHE活性，分别为26.59 µmol h ^-1和0.45 µmol h ^-1。。gC ₃ N ₄ / UFR-NC _0.02的PHE活性在70 h内运行14次后无明显变化。我们的结果表明，构建碳质材料修饰的gC ₃ N ₄基于光的催化系统将是PHE的一项有前途的策略。