实现高效稳定的光催化降解二甲苯取决于具有优异可见光活性的光催化材料的进步。这种低碳战略是有效应对空气污染的一个有前途的解决方案。本研究采用水热法合成了Z型异质结Ag@CuO/UiO-66-NH 2纳米复合材料，并研究其在可见光条件下对二甲苯气体的光降解性能。采用 XRD、XPS、SEM、FTIR 和 UV-vis 分析来确认 Z 型异质结的存在。CuO/UiO-66-NH 2 (CuU-2)复合材料具有较高的光催化活性，是原始UiO-66-NH 2的2.37倍。Z型异质结的结合促进了有效的电荷转移和分离，从而显着增强了光催化活性。Ag@CuO/UiO-66-NH 2 (Ag-1@CuU)复合材料具有最高的光催化活性，降解效率为84.12%，是UiO-66-NH 2和CuO/的3.36倍和1.41倍。分别为UiO-66-NH 2。银助催化剂提高了复合材料对可见光的吸收能力，使紫外可见光吸收边红移，显着提高了光催化性能。这项研究介绍了一种新的二甲苯气体降解方法，并提供了一种设计和合成具有卓越性能的金属有机骨架（MOF）基光催化剂的通用策略。

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Achieving efficient and stable photocatalytic degradation of xylene hinges on the advancement of photocatalytic materials with outstanding visible light activity. This low-carbon strategy serves as a promising solution to combat air pollution effectively. In this study, we synthesized a Z-scheme heterojunction Ag@CuO/UiO-66-NH2 nanocomposite by hydrothermal method to investigate its photodegradation properties for xylene gas under visible light conditions. XRD, XPS, SEM, FTIR, and UV–vis analyses were employed to confirm the presence of the Z-scheme heterojunction. The CuO/UiO-66-NH2 (CuU-2) composite has high photocatalytic activity, which is 2.37 times that of the original UiO-66-NH2. The incorporation of Z-scheme heterojunction facilitates efficient charge transfer and separation, leading to a substantial enhancement in photocatalytic activity. The Ag@CuO/UiO-66-NH2 (Ag-1@CuU) composite has the highest photocatalytic activity with a degradation efficiency of 84.12%, which is 3.36 times and 1.41 times that of UiO-66-NH2 and CuO/UiO-66-NH2, respectively. The silver cocatalyst improves the absorption capacity of the composite material to visible light, makes the ultraviolet visible absorption edge redshift, and significantly improves the photocatalytic performance. This study introduces a novel approach for xylene gas degradation and offers a versatile strategy for designing and synthesizing metal–organic framework (MOF)-based photocatalysts with exceptional performance.