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利用铁酸钴纳米纤维优良的磁性和锰氧化物优异的吸附性能,以介孔铁酸钴纤维为载体,在其表面负载纳米二氧化锰,制备了锰氧化物修饰铁酸钴纳米棒复合材料。通过X射线衍射、扫描电子显微镜、X射线能谱、Fourier红外光谱等测试手段对样品形貌和物相组成进行了表征。将所得样品用于去除模拟污染水体中的染料,考察了不同制备条件下所得产物对亚甲基蓝的吸附性能,探讨了吸附过程的热力学和动力学过程。结果表明:铁酸钴纳米纤维上负载锰氧化物复合材料对亚甲基蓝有优异的吸附能力,最大吸附容量可达99.60 mg/g。常温下,其吸附等温线可用Langmuir吸附模型描述,吸附动力学符合Lagergren二级速率方程,吸附为放热自发过程。
By using the excellent magnetic properties of cobalt ferrite nanofibers and the excellent adsorption performance of manganese oxide, the nanometer manganese dioxide was loaded on the surface of the mesoporous cobalt ferrite fiber as the carrier, and the manganese oxide-modified cobalt ferrite nanorod composite material was prepared . The morphology and phase composition of the samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy and Fourier infrared spectroscopy. The obtained sample was used to remove the dyes in the simulated polluted water. The adsorption properties of methylene blue on the prepared products were investigated. The thermodynamics and kinetics of the adsorption process were discussed. The results show that manganese oxide composite loaded on cobalt ferrite nanofibers has excellent adsorption capacity for methylene blue with the maximum adsorption capacity of 99.60 mg / g. At room temperature, the adsorption isotherms can be described by the Langmuir adsorption model, and the adsorption kinetics are in accordance with the Lagergren second-order rate equation. The adsorption is spontaneous and exothermic.