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首页> 外文期刊>RSC Advances >MIL-101(Cr)-cobalt ferrite magnetic nanocomposite: synthesis, characterization and applications for the sonocatalytic degradation of organic dye pollutants
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MIL-101(Cr)-cobalt ferrite magnetic nanocomposite: synthesis, characterization and applications for the sonocatalytic degradation of organic dye pollutants

机译：MIL-101（CR） - 钴铁氧体磁性纳米复合材料：用于有机染料污染物的儿童催化降解的合成，表征和应用

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In this study, for the first time, a novel magnetically recyclable MIL-101(Cr)/CoFe(2)O(4)nanocomposite was preparedviaa facile solvothermal method. The morphology, structural, magnetic and optical properties of the nanocomposite were characterizedviafield emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), UV-visible spectroscopy (UV-visible) and BET surface area analysis. Furthermore, the sonocatalytic activity of the MIL-101(Cr)-based magnetic nanocomposite was explored for the degradation of organic dye pollutants such as Rhodamine B (RhB) and methyl orange (MO) under ultrasound irradiation in the presence of H2O2. Under optimized conditions, the degradation efficiency reached 96% for RhB and 88% for MO. The sonocatalytic activity of MIL-101(Cr)/CoFe(2)O(4)was almost 12 and 4 times higher than that of the raw MIL-101(Cr) and pure CoFe2O4, respectively. The improved sonocatalytic performance of the as-prepared binary nanocomposite can be attributed to the relatively high specific surface area of MIL-101(Cr) and magnetic property of CoFe2O4, as well as the fast generation and separation of charge carriers (electrons and holes) in MIL-101(Cr) and CoFe2O4. In addition, the trapping tests demonstrated that center dot OH radicals are the main active species in the dye degradation process. Moreover, the most influencing factors on the sonocatalytic activity such as the H(2)O(2)amount, initial dye concentration and catalyst dosage were investigated. Finally, the nanocomposite was magnetically separated and reused without any observable change in its structure and performance even after four consecutive runs.
机译：在这项研究中，首次进行一种新型磁性可再循环MIL-101（Cr）/ CoFe（2）O（4）纳米复合材料是制备viaa容易的溶剂质方法。纳米复合材料的形态，结构，磁性和光学性质是表征viafia发射扫描电子显微镜（Fe-SEM），透射电子显微镜（TEM），能量分散X射线（EDX）光谱，X射线衍射（XRD），傅立叶变换红外光谱（FT-IR），振动样品磁力计（VSM），UV可见光谱（UV可见）和BET表面积分析。此外，在H 2 O 2存在下，探讨了用于在超声辐射下的有机染料污染物的降解有机染料污染物的有机染料污染物如罗丹明B（RHB）和甲基橙（Mo）的致氧化纳米复合材料的同胞催化活性。在优化条件下，rhb的降解效率达到96％和88％。 MIL-101（Cr）/ coFe（2）O（4）的单催化活性分别比原始MIL-101（Cr）和纯COFE2O4高的12和4倍。制备的二元纳米复合材料的改善的Sonocatalytic性能可以归因于Cofe2O4的MIL-101（Cr）和磁性的相对高的比表面积，以及电荷载体的快速产生和分离（电子和孔）在MIL-101（CR）和COFE2O4中。此外，诱捕试验证明中心点OH基团是染料降解过程中的主要活性物质。此外，研究了SONOCATALYTIC活性的影响因素，例如H（2）O（2）量，初始染料浓度和催化剂剂量。最后，磁性分离并重复使用磁性分离，并且即使在连续四次运行之后，也没有任何可观察的变化。

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