Fe-ZrO 2 . 通过扫描电子显微镜(SEM)、X 射线衍射(XRD)、X 射线光电子能谱(XPS)、N 2 吸附-脱附、红外光谱(FT-IR) 和紫外-可见光吸收光谱(UV-vis DRS)等方法对催化剂的形貌和结构进行表征, 利用荧光(PL)和电化学阻抗对催化剂的 电化学性能进行分析. 最后, 研究了催化剂对罗丹明 B 溶液的可见光降解作用, 结果表明通过煅烧 Fe 3＋ /UiO-66 前驱体 的方法制备的 Fe-ZrO 2 催化剂, 在可见光照射下对罗丹明 B 的降解率为 83%, 循环三次后降解率依然能够达到 78%, 稳 定性好.

The novel 3 dimension (3D) nanocomposite photocatalyst Eu-ZnO/MIL-53(Fe) was successfully prepared with in situ synthesis. Firstly the rare earth element Eu was doped into semiconductor ZnO and then Eu-ZnO was combined with MIL-53(Fe). The structure, morphology, optical and electrical properties of the nanocomposites were thoroughly characterized by X-ray diffraction (XRD), fourier infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), N 2 adsorption-desorption isotherms (S BET ), photoluminescence spectra (PL) and electrochemical impedance (EIS) spectra and the like. The FT-IR and XRD results showed that the photocatalysts were successfully prepared and SEM results showed that morphology of the MIL-53(Fe) were all well remained after the preparing process. The photocatalytic experiment data, UV-Vis DRS spectra and PL spectra and the like results showed that the introduction of rare earth elements Eu could greatly improve the photocatalytic efficiency of , and promote the effective separation of photogenerated electron-hole, which further improved the catalytic activity. The results of electrochemical impedance spectra further supported the conclusion. By exploring the photo-

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