CdS Quantum dots (QDs) anchored onto the surface of MOF-808 (hereafter designated as CdS QDs@MOF-808) were constructed by solvothermal method and applied for degradation of ciprofloxacin (CIP) under visible light irradiation. The impacts of pH values and initial concentrations of CIP on adsorption and photocatalytic activity were explored in detail. The as-prepared CdS QDs@MOF-808 composites showed enhanced synergistic adsorption capacity and photocatalytic properties, especially for the CM-20 sample with 20 % CdS QDs loading exhibiting about 5.2 times adsorption capacity (130 mg/g) and approximately 5.5 times photocatalytic removal rate ( 82 %) for CIP compared with the pristine CdS and MOF-808. Various techniques such as XPS, UV‐vis DRS, Zeta potential, EIS, PL as well as transient photocurrent responses have demonstrated that the synergistic effect of CdS QDs and MOF-808 is ascribed to the enhanced electrostatic interactions and Zr-S forces, improving the utilization of visible light and effectively photogenerated electrons transported from the conduction band of CdS to that of MOF-808. Gas chromatography-mass spectroscopy (GC-MS) was used to detect the possible intermediates in the degradation process of CIP.

中文翻译：

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CdS QD 散布在 MOF-808 上作为吸附光催化剂，可有效实现可见光驱动的环丙沙星降解

采用溶剂热法构建锚定在MOF-808表面的CdS量子点（QDs）（以下称为CdS QDs@MOF-808），并应用于可见光照射下降解环丙沙星（CIP）。详细探讨了 pH 值和 CIP 初始浓度对吸附和光催化活性的影响。所制备的 CdS QDs@MOF-808 复合材料表现出增强的协同吸附能力和光催化性能，特别是对于具有 20% CdS QDs 负载量的 CM-20 样品，表现出约 5.2 倍的吸附容量（130 mg/g）和约 5.5 倍的光催化性能与原始 CdS 和 MOF-808 相比，CIP 的去除率（82%）。 XPS、UV-vis DRS、Zeta 电位、EIS、PL 以及瞬态光电流响应等各种技术已证明 CdS QD 和 MOF-808 的协同效应归因于增强的静电相互作用和 Zr-S 力，从而改善利用可见光和有效的光生电子从 CdS 的导带传输到 MOF-808 的导带。采用气相色谱-质谱联用仪(GC-MS)检测CIP降解过程中可能存在的中间体。