This study presents a novel photocatalytic composite, AgPO/GCN/FeNi-BTC/CQD (AGF-CQD), synthesized via a green microwave-assisted hydrothermal method, integrating carbon quantum dots (CQDs) derived from aquaculture by-products. The AGF-CQD composite demonstrates superior photocatalytic activity, attributed to enhanced visible light absorption, efficient charge transfer, and improved electron-hole separation. Analytical techniques such as photoluminescence (PL), UV–Vis diffuse reflectance spectroscopy (DRS), and transmission electron microscopy (TEM) validate the composite’s structural and optical properties. In tetracycline degradation tests, AGF-CQD outperforms AgPO, GCN, FeNi-BTC, and 20 % AGF samples by 5.5, 3.6, 4.4, and 2.3 times, respectively, achieving a remarkable 98.4 % removal rate after 60 min under visible light. Factors affecting degradation, including dosage, concentration, pH, and water source, are investigated. Furthermore, an operating mechanism based on electrochemical properties and the involvement of radicals is proposed. This research offers a sustainable approach to synthesizing efficient photocatalysts for environmental remediation.

中文翻译：

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增强可见光下四环素光催化降解：释放Z型Ag3PO4/GCN/FeNi-BTC光催化剂与碳量子点的协同作用


本研究提出了一种新型光催化复合材料 AgPO/GCN/FeNi-BTC/CQD (AGF-CQD)，通过绿色微波辅助水热法合成，集成了来自水产养殖副产品的碳量子点 (CQD)。 AGF-CQD 复合材料表现出优异的光催化活性，这归因于增强的可见光吸收、有效的电荷转移和改进的电子空穴分离。光致发光 (PL)、紫外-可见漫反射光谱 (DRS) 和透射电子显微镜 (TEM) 等分析技术验证了复合材料的结构和光学特性。在四环素降解测试中，AGF-CQD 的性能分别比 AgPO、GCN、FeNi-BTC 和 20% AGF 样品高 5.5、3.6、4.4 和 2.3 倍，在可见光下 60 分钟后去除率达到 98.4%。研究了影响降解的因素，包括剂量、浓度、pH 值和水源。此外，提出了一种基于电化学性质和自由基参与的操作机制。这项研究提供了一种可持续的方法来合成用于环境修复的高效光催化剂。