Synthesis of NiFe2O4@AC/UiO‐66(Zr) for Enhancement of the Photocatalytic Performance of Alizarin Yellow R Under Visible‐light,ChemistrySelect

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Synthesis of NiFe2O4@AC/UiO‐66(Zr) for Enhancement of the Photocatalytic Performance of Alizarin Yellow R Under Visible‐light
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-02-01 , DOI: 10.1002/slct.202004567
Omnia A. Elshamy ₁ , Esraa M. El‐Fawal ₁

Affiliation

In this study, NiFe₂O₄@AC/UiO‐66(Zr) composites were successfully prepared with different ratios of UiO‐66(Zr) as support for NiFe₂O₄@AC, (1 : 1), (2 : 1) and (3 : 1) named NiFe₂O₄@AC/UiO‐66(Zr)‐1, NiFe₂O₄@AC/UiO‐66(Zr)‐2 and NiFe₂O₄@AC/UiO‐66(Zr)‐3, respectively. The prepared composites were characterized by X‐Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X‐Ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), ultraviolet‐visible diffuse reflectance (UV‐Vis/DRS) spectroscopy, PL (Photoluminescence) study. The synthesized composites′ efficiencies to enhance the photodegradation of alizarin yellow R (AYR) under visible‐light were evaluated. The results identified that NiFe₂O₄@AC/UiO‐66(Zr)‐2 is the most photoreactive photocatalyst with the lowest bandgap ∼1.7 eV. NiFe₂O₄@AC/UiO‐66(Zr)‐2 shows higher photodegradation efficiency (97.9 %) compared to NiFe₂O₄@AC/UiO‐66(Zr)‐1 and NiFe₂O₄@AC/UiO‐66(Zr)‐3 with photodegradation efficiency of 75.1 % and 89.9 %, respectively after 180 min under visible‐light. The photodegradation reaction of AYR was found to be pseudo first‐order reaction, and the rate constant (Ka) for NiFe₂O₄@AC/UiO‐66(Zr)‐1, NiFe₂O₄@AC/UiO‐66(Zr)‐2, and NiFe₂O₄@AC/UiO‐66(Zr)‐3 are 0.0072 min⁻¹, 0.0204 min⁻¹, and 0.0122 min⁻¹, consecutively. The effects of various conditions such as initial concentration and photocatalyst dose on the photodegradation of AYR were determined. The high photodegradation efficiency of NiFe₂O₄@AC/UiO‐66(Zr)‐2 composite is because of the heterojunction and effective charge transfer between NiFe₂O₄@AC and UiO‐66(Zr). NiFe₂O₄@AC/UiO‐66(Zr)‐2 photocatalyst exhibits photocatalytic stability and reusability up to five cycles.

中文翻译：

NiFe2O4 @ AC / UiO-66（Zr）的合成在可见光下增强茜素黄R的光催化性能

在这项研究中，成功制备了NiFe ₂ O ₄ @ AC / UiO-66（Zr）复合材料，以不同比例的UiO-66（Zr）作为NiFe ₂ O ₄ @AC的载体，（1：1），（2： 1）和（3：1）分别命名为NiFe ₂ O ₄ @ AC / UiO-66（Zr）-1，NiFe ₂ O ₄ @ AC / UiO-66（Zr）-2和NiFe ₂ O ₄ @ AC / UiO- 66（锆）‐ 3，分别。制备的复合材料通过X射线衍射（XRD），傅里叶变换红外光谱（FTIR），X射线光电子能谱（XPS），热重分析（TGA），扫描电子显微镜（SEM），Brunauer-Emmett-Teller（ BET），紫外可见漫反射（UV-Vis / DRS）光谱，PL（光致发光）研究。评价了合成的复合材料在可见光下增强茜素黄R（AYR）光降解的效率。结果表明，NiFe ₂ O ₄ @ AC / UiO-66（Zr）-2是最具光反应性的光催化剂，带隙最低，约为1.7 eV。NiFe ₂ O ₄ @ AC / UiO-66（Zr）-2与NiFe ₂ O ₄ @ AC / UiO-66（Zr）-1和NiFe ₂ O ₄ @ AC / UiO-66（Zr）-3相比，具有更高的光降解效率（97.9％），光降解效率分别为75.1％和89.9％，分别在可见光下180分钟后。发现AYR的光降解反应是拟一级反应，NiFe ₂ O ₄ @ AC / UiO-66（Zr）-1，NiFe ₂ O ₄ @ AC / UiO-66（）的速率常数（Ka）Zr）-2和NiFe ₂ O ₄ @ AC / UiO-66（Zr）-3为0.0072分钟^-1，分别为0.0204分钟^-1和0.0122分钟^-1。确定了各种条件（例如初始浓度和光催化剂剂量）对AYR光降解的影响。NiFe ₂ O ₄ @ AC / UiO-66（Zr）-2复合材料的高光降解效率是由于NiFe ₂ O ₄ @AC与UiO-66（Zr）之间的异质结和有效的电荷转移。NiFe ₂ O ₄ @ AC / UiO-66（Zr）-2光催化剂显示最多五个循环的光催化稳定性和可重复使用性。

更新日期：2021-02-01

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