Wastewater containing organic dyes is harmful to the ecological environment and human health. Graphitic carbon nitride (g-C₃N₅) is suitable for the photocatalytic degradation of organic dyes, but its photocatalytic activity is low due to several drawbacks. A series of Ag–CeO₂/g-C₃N₅ composites with different morphologies of Ag–CeO₂ have been prepared in order to improve the photocatalytic activity of g-C₃N₅. The photocatalytic activities of the Ag–CeO₂/g-C₃N₅ composites were investigated using rhodamine B (RhB) as the target pollutant. When compared with Ag–CeO₂ spheres and g-C₃N₅, the charge separation efficiency and photocatalytic activity of the Ag–CeO₂/g-C₃N₅ heterostructure were significantly improved. The photodegradation rate of RhB using 50 wt% Ag (1.50)-CeO₂(sphere)/g-C₃N₅ was 96.5 %, while pure g-C₃N₅ and Ag (1.50)-CeO₂ spheres was 30.8 and 9.9 %, respectively. This was attributed to the synergistic effect of the heterojunction comprised of Ag, CeO₂, and g-C₃N₅. As an electronic medium, Ag transfers electrons between g-C₃N₅ and CeO₂, which can promote electron-hole separation and improve the photocatalytic activity. The 50 wt% Ag (1.50)-CeO₂(sphere)/g-C₃N₅ composites also had fair photocatalytic stability and ·O₂⁻ plays a dominant role in the RhB photodegradation process. In addition, the photocatalytic mechanism of 50 wt% Ag (1.50)-CeO₂(sphere)/g-C₃N₅ has also been described.

含有有机染料的废水对生态环境和人体健康有害。石墨氮化碳(gC ₃ N ₅ )适用于有机染料的光催化降解，但由于存在一些缺点，其光催化活性较低。为了提高gC ₃ N _{5的光催化活性，制备了}一系列具有不同Ag- CeO _{2形貌的Ag-CeO 2 /gC 3} N ₅复合材料。以罗丹明B（RhB）为目标污染物，研究了Ag-CeO ₂ /gC ₃ N ₅复合材料的光催化活性。与Ag-CeO ₂球和gC ₃ N _{5相比，Ag-CeO 2} /gC ₃ N ₅异质结构的电荷分离效率和光催化活性显着提高。使用50wt％Ag(1.50)-CeO ₂ (球)/gC ₃ N ₅时RhB的光降解率为96.5％，而纯gC ₃ N ₅和Ag(1.50)-CeO ₂球的光降解率分别为30.8％和9.9％ 。这归因于由Ag、CeO ₂和gC ₃ N _{5组成的异质结的协同效应}。Ag作为电子介质，在gC ₃ N ₅和CeO ₂之间传递电子，可以促进电子空穴分离，提高光催化活性。50 wt% Ag (1.50)-CeO ₂ (球体)/gC ₃ N ₅复合材料也具有良好的光催化稳定性，并且· O ₂ ^-在RhB光降解过程中起主导作用。此外，还描述了50wt％Ag(1.50)-CeO ₂ (球)/gC ₃ N _{5的光催化机理。}