摘要/Abstract

金属有机骨架（UiO-66）具有大的比表面积和强的吸附能力，且金属锆离子高度有序地排列在框架中.先采用UiO-66的结构特点使其吸附Fe³⁺，再通过煅烧前驱体Fe³⁺/UiO-66的方法成功制备出Fe掺杂的ZrO₂纳米光催化剂Fe-ZrO₂.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）、N₂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Fe³⁺/UiO-66前驱体的方法制备的Fe-ZrO₂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.
关键词: UiO-66, Fe-ZrO₂, 可见光催化, RhB, 光降解
A new porous crystalline materials Zr-containing organic framework of UiO-66 has a large specific surface area, strong adsorption capacity, and the highly ordered arrangement of metal ions in its crystal structure. In this study, because UiO-66 has a good structural features, Fe-doped nano-ZrO₂ photocatalyst of Fe-ZrO₂ were successfully prepared by the adsorption of Fe³⁺ onto UiO-66, and calcination of the precursor of Fe³⁺/UiO-66, subsequently. The morphology and structure of the catalyst were characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), N₂ adsorption-desorption isotherm, Fourier transform infrared spectroscopy (FT-IR) and UV-Vis absorption spectroscopy (UV-vis DRS). The electrochemical performance of the catalyst was analyzed by fluorescence (PL) and electrochemical impedance spectroscopy. Finally, the photodegradation of rhodamine B solution by the catalysis of Fe-ZrO₂ was studied. The results showed that the degradation rate of rhodamine B (RhB) under visible light irritation was 83% in 120 min with the catalyst of Fe-ZrO₂ from the calcination of the precursor Fe³⁺/UiO-66. The catalyst has a promising stability. The degradation rate to RhB could still reach 78% after three cycles.
Key words: UiO-66, Fe-ZrO₂, visible-light photocatalysis, RhB, photodegradation


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