Ag nanoparticles decorated NiAl-layered double hydroxide/graphitic carbon nitride (Ag/LDH/g-C₃N₄) nanocomposites were synthesized for the first time by an in situ hydrothermal method, followed by photoreduction. The visible-light-driven Ag/LDH/g-C₃N₄ nanocomposites exhibited enhanced performance for the photocatalytic degradation of aqueous Rhodamine B and 4-chlorophenol. Notably, the Ag/LDH/g-C₃N₄ nanocomposite with LDH and Ag contents of 15 wt% and 1 wt%, respectively, showed the highest photocatalytic performance, which was far superior to that observed for pure g-C₃N₄, LDH, and the binary Ag/g-C₃N₄ and LDH/g-C₃N₄ composites. The enhanced photocatalytic efficiency was mainly attributed to rapid charge transfer at the Ag/LDH/g-C₃N₄ interfaces and the surface plasmon resonance of the Ag nanoparticles, which promotes the separation efficiency of photogenerated charge carriers and improves optical absorption. Additionally, the Ag/LDH/g-C₃N₄ nanocomposites exhibited excellent photostability during successive experimental runs, with no significant change in degradation performance. These findings are expected to provide new mechanistic insights into the design and construction of efficient visible-light-driven photocatalysts for application in solar energy conversion and environmental remediation.

用原位水热法首次合成了装饰有AgAl的NiAl层状双氢氧化物/石墨碳氮化物（Ag / LDH / gC ₃ N ₄）纳米复合材料。可见光驱动的Ag / LDH / gC ₃ N ₄纳米复合材料对罗丹明B和4-氯苯酚的光催化降解表现出增强的性能。值得注意的是，LDH和Ag含量分别为15 wt％和1 wt％的Ag / LDH / gC ₃ N ₄纳米复合材料显示出最高的光催化性能，远远优于纯gC ₃ N ₄，LDH，和二进制Ag / gC₃ N ₄和LDH / gC ₃ N ₄复合材料。增强的光催化效率主要归因于在Ag / LDH / gC ₃ N ₄界面上的快速电荷转移和Ag纳米粒子的表面等离子体共振，从而提高了光生载流子的分离效率并改善了光吸收。另外，Ag / LDH / gC ₃ N ₄纳米复合材料在连续的实验过程中表现出出色的光稳定性，降解性能没有明显变化。这些发现有望为用于太阳能转化和环境修复的有效可见光驱动光催化剂的设计和构造提供新的机械原理。