A new visible-light active polymeric semiconductor was fabricated covalently functionalizing the g-C₃N₄ using halogenated phenyl groups. 4-bromobenzonitrile was employed to introduce organic motifs into g-C₃N₄ networks through a convenient one-pot thermally induced process. The functionalization of the g-C₃N₄ with the halogenated phenyl group extended the original π-conjugation system, leading to the enhancement of visible-light absorption, and the separation of charge carriers. Introducing the new group, the g-C₃N₄ pore structure was enriched, resulting in a larger specific surface area and an increase in active sites. The functionalization led to an easier exfoliation of the g-C₃N₄ framework into thinner layers, enhancing its dispersion ability in the water. Under visible-light irradiation, the as-prepared semiconductor exhibited increased photocatalytic activity to the pristine g-C₃N₄. The photocatalytic performances were investigated on a simple organic compound, methanol, a model dye, rhodamine B, and an emergent contaminant, 4-nitrophenol. This research provided new insights on metal-free modified g-C₃N₄ as a visible-light photocatalyst.

使用卤代苯基共价官能化 gC ₃ N ₄制造了一种新的可见光活性聚合物半导体。4-溴苄腈用于通过方便的一锅热诱导过程将有机基序引入gC ₃ N ₄网络。gC ₃ N ₄与卤代苯基的官能化扩展了原始的π-共轭体系，导致可见光吸收增强和电荷载流子分离。介绍新组 gC ₃ N ₄孔结构丰富，导致比表面积更大，活性位点增加。功能化导致 gC ₃ N ₄骨架更容易剥离成更薄的层，增强其在水中的分散能力。在可见光照射下，所制备的半导体对原始 gC ₃ N ₄表现出更高的光催化活性。在简单的有机化合物甲醇、模型染料罗丹明 B 和紧急污染物 4-硝基苯酚上研究了光催化性能。这项研究为无金属改性 gC ₃ N ₄作为可见光光催化剂提供了新的见解。