Some of the persistent hazardous contaminants that readily dissolve in water with a recognizable hue are hexavalent chromium and neomycin antibiotic. Herein, a Z-scheme g-C₃N₅/Gd-MOF/silver nanocube (CNGdAg) ternary composite was successfully designed by the combination of graphitic carbon nitride (g-C₃N₅), gadolinium-based molecular organic framework (Gd-MOF), and silver nanocubes (AgNCs). Under visible light irradiation, CNGdAg outperforms individual components and binary composites in the photoreduction of hexavalent chromium (Cr⁶⁺) and removal of neomycin. The maximum photocatalytic efficiency of Cr⁶⁺ (98%) in 150 minutes and complete neomycin removal in 25 minutes were accomplished by the CNGdAg-40% composite. A hydrothermal approach was chosen to prepare this visible light active composite. The formation of photogenerated electrons and superoxide radicals plays a major contributing factor in the efficient degradation in a short period without using any external components. The combined effect of the individual components in the composite led to the remarkable degradation via the Z-scheme pathway. This work exemplifies that the CNGdAg-40% photocatalyst can be used for the removal of heavy metal ions and organic contaminants from aquatic environments.

中文翻译：

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轻松制造 Z 型 g-C3N5/Gd-MOF/银纳米立方复合材料作为新一代可见光活性光催化剂，用于消除持久性有毒污染物

一些容易溶解在水中并具有可识别色调的持久性有害污染物是六价铬和新霉素抗生素。在此，通过石墨碳氮化物（gC ₃ N ₅ ）、钆基分子有机骨架（Gd-MOF）的组合，成功设计了Z型gC ₃ N ₅ /Gd-MOF/银纳米立方体（CNGdAg）三元复合材料。和银纳米立方体 (AgNC)。在可见光照射下，CNGdAg 在光还原六价铬 (Cr ⁶⁺ ) 和去除新霉素方面优于单个组分和二元复合材料。CNGdAg-40%复合材料在150分钟内实现了Cr ⁶⁺的最大光催化效率（98%），并在25分钟内完全去除新霉素。选择水热法来制备这种可见光活性复合材料。光生电子和超氧自由基的形成是在不使用任何外部组件的情况下在短时间内有效降解的主要因素。复合材料中各个组分的综合作用导致通过Z 型途径的显着降解。这项工作例证了CNGdAg-40%光催化剂可用于去除水生环境中的重金属离子和有机污染物。