超顺磁性 MgFe2O4@CeO2 纳米复合材料的制备、表征和光催化性能：采用简便绿色的溶胶-凝胶法合成

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2024-03-12 DOI:10.1016/j.jre.2024.03.006

Saeid Taghavi Fardood, Fateme Yekke Zare, Farzaneh Moradnia, Ali Ramazani

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引用次数: 0

摘要

利用粉末 X 射线衍射 (XRD)、振动样品磁力计 (VSM)、扫描电子显微镜 (SEM)、色散 X 射线分析 (EDX)、元素图谱 (MAP)、透射电子显微镜 (TEM)、布鲁诺-艾美特-泰勒 (BET) 和紫外-可见漫反射光谱 (DRS) 分析，对 MgFeO@CeO 超顺磁性纳米复合材料的特性进行了深入研究。评估了合成样品作为新型磁性纳米催化剂在室内可见光条件下降解水溶液中刚果红（CR）染料的光催化活性。结果表明，光催化降解效率高于吸光和光解效率。光降解的降解效率为 93%，总有机碳去除率为 49%。所制备的 MgFeO@CeO 磁性纳米复合材料（MNCs）可轻松回收并循环使用五次，表明磁性纳米复合材料在废水和水处理中具有潜在的广泛效率。利用 SEM 和 TEM 技术，MgFeO@CeO MNCs 的纳米级形貌特征为球形，尺寸范围为 35-40 nm。利用 VSM 分析了所得纳米复合材料的饱和磁化率（），结果显示其值为 3.58 emu/g。此外，利用 BET 分析确定的表面积为 27.194 m/g，通过 DRS 分析确定的带隙为 2.85 eV。

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Preparation, characterization and photocatalysis performances of superparamagnetic MgFe2O4@CeO2 nanocomposites: Synthesized via an easy and green sol–gel method

The characterization of MgFeO@CeO superparamagnetic nanocomposites was thoroughly investigated using powder X-ray diffraction (XRD), a vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), dispersive X-ray analysis (EDX), elemental mapping (MAP), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) and UV–Vis diffuse reflectance spectroscopy (DRS) analyses. The photocatalytic activity of the synthesized samples was evaluated as a novel magnetic nanocatalyst for degrading Congo red (CR) dye in an aqueous solution under visible light at room conditions. The results demonstrate that the efficiency of photocatalytic degradation is higher than that of absorbance and photolysis. The degradation efficiency of photodegradation is 93% within 49% of total organic carbon removal performance. The prepared MgFeO@CeO magnetic nanocomposites (MNCs) can be easily recovered and recycled for five repeated cycles, demonstrating potential extensive efficiency in magnetic nanocomposites in wastewater and water treatment. The nanoscale morphology of MgFeO@CeO MNCs was characterized as spherical, with a size range of 35–40 nm, utilizing SEM and TEM techniques. The saturation magnetization () of the resulting nanocomposites was analyzed by VSM, revealing a value of 3.58 emu/g. Furthermore, the surface area was determined to be 27.194 m/g using BET analysis, and the band gap was identified as 2.85 eV through DRS analysis.

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.