Abstract

Fibrous cobalt ferrite catalyst was synthesized using the sol–gel method combined with celloulose template. This technology can exactly reproduce the microstructure of cellulose template on nanometer level. The obtained cobalt ferrite was characterized by field emission scanning electron microscope (FESEM), x-ray diffractometry (XRD), fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometer. Cobalt ferrite exhibited high efficiency to activate peroxymonosulfate (PMS) for the degradation of Acid Orange 7. The effects of experimental parameters including initial pH values of dye solution, effect of concentrations of PMS and CoFe₂O₄ on Acid Orange 7 degradation were studied. Furthermore, CoFe₂O₄ also displayed an extremely high catalytic performance in the degradation of Methyl Orange, Reactive Brilliant Red X-3B, Methylene Blue and Rhodamine B. CoFe₂O₄ retained high degradation efficiency and high stability even after being reused for five runs. The inherent magnetism of ferrite leads to easy separation of catalyst from the reaction mixtures. Consequently, the catalyst durability is improved remarkably.

CoFe₂O₄ magnetic fiber nanomaterial was synthesized using the sol–gel method combined with celloulose template and exhibited high catalytic activity for AO7 degradation in presence of peroxymonosulfate.

中文翻译：

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天然纤维素模板轻松合成CoFe 2 O 4磁性纳米材料及其在过氧单硫酸盐非均相活化中的催化性能

摘要

纤维状钴铁氧体催化剂是采用溶胶-凝胶法与纤维素模板相结合合成的。这项技术可以在纳米水平上精确地再现纤维素模板的微观结构。通过场发射扫描电子显微镜（FESEM），X射线衍射仪（XRD），傅立叶变换红外光谱仪（FT-IR）和振动样品磁力计对所得的钴铁氧体进行表征。铁氧体对过氧化一硫酸盐（PMS）的降解具有很高的活化能力，可降解酸性橙7。研究了包括染料溶液初始pH值，PMS浓度和CoFe ₂ O ₄浓度对酸性橙7降解的实验参数的影响。此外，CoFe ₂ O ₄在甲基橙，活性艳红X-3B，亚甲蓝和若丹明B.由CoFe的降解也显示非常高的催化性能₂ ö ₄即使被重复使用五次运行后保留高降解效率和高稳定性。铁氧体的固有磁性使催化剂容易从反应混合物中分离出来。因此，催化剂的耐久性显着提高。