The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang 212300, P. R. China.
Lianyungang Higher Vocational Technical College Traditional Chinese Medicine, Lianyungang, 222007, P. R. China.
J Nanosci Nanotechnol. 2021 Apr 1;21(4):2203-2211. doi: 10.1166/jnn.2021.19037.
Magnetic CoFe₂O₄ nanoparticles were successfully manufactured through the process of nitrate combustion using anhydrous ethanol as fuel, they together with their intermediate were characterized by thermo gravimetric (TG) analysis, selected area electron diffraction (SAED), transmission electron microscope (TEM), vibrating sample magnetometer (VSM), and X-ray diffraction (XRD). These results indicated a phenomenon that the magnetic CoFe₂O₄ nanoparticles could be formed at 400 °C, the average grain size, the specific magnetization, and the specific surface area of magnetic CoFe₂O₄ nanoparticles fabricated at 400 °C for 2 h with 30 mL anhydrous ethanol were corresponding 20 nm, 78.0 Am²/kg and 83.2 m²/kg. Magnetic CoFe₂O₄ nanoparticles were in application to adsorb methyl blue (MB) of wastewater, and their adsorption performances and electrochemical properties were investigated, the adsorption process data well agreed with the pseudo-second-order kinetics model in concentration ranging from 100 mg/L to 400 mg/L of MB. Compared with Freundlich model, Langmuir model (correlation coefficient ² = 0.9976) could evaluate the adsorption equilibrium state of MB onto CoFe₂O₄ nanoparticles at indoor temperature, so the monomolecular layer adsorption mechanism was demonstrated to be the mechanism of the MB molecules' adsorption onto CoFe₂O₄ nanoparticles.
通过使用无水乙醇作为燃料的硝酸盐燃烧过程成功制造出了磁性 CoFe₂O₄ 纳米粒子，它们的中间体通过热重（TG）分析、选区电子衍射（SAED）、透射电子显微镜（TEM）、振动样品磁强计（VSM）和 X 射线衍射（XRD）进行了表征。这些结果表明，在 400°C 下可以形成磁性 CoFe₂O₄ 纳米粒子，在 400°C 下用 30 毫升无水乙醇反应 2 小时制备的磁性 CoFe₂O₄ 纳米粒子的平均晶粒尺寸、比磁化强度和比表面积分别为 20nm、78.0Am²/kg 和 83.2m²/kg。磁性 CoFe₂O₄ 纳米粒子可用于吸附废水中的亚甲基蓝（MB），并研究了其吸附性能和电化学性能，在 100mg/L 至 400mg/L 的 MB 浓度范围内，吸附过程数据与准二级动力学模型吻合较好。与 Freundlich 模型相比，Langmuir 模型（相关系数 ² = 0.9976）可以评估 MB 在室内温度下在 CoFe₂O₄ 纳米粒子上的吸附平衡状态，因此证明了 MB 分子在 CoFe₂O₄ 纳米粒子上的吸附是单分子层吸附的机制。
