A novel core-shell cobalt and nickel based metal organic framework (MOF) nano-composites in the presence of the magnetic and non-magnetic walnut based activated carbon (AC) were subsequently employed for the adsorption of methylene blue (MB) in the batch system which were synthesized by an efficient and a facile preparation method. The nano-composites were characterized by applying general tests including XRD, FTIR, FESEM, EDX, TEM, VSM, TGA and BET. The findings indicated that the nanoparticle size of the well dispersed magnetic nano-composites was less than 20 nm. The core-shell structure of magnetic nanocomposites was detected from TEM images. The analytical achievements also demonstrated that the thermal resistance of the magnetic composites was higher than that of other samples. The maximum adsorption capacities were calculated to be 128 and 112.32 mg/g for the cobalt based MOF supported on the non-magnetic and magnetic ACs, respectively which was higher compared with the nickel based composites. Langmuir isotherm and a pseudo second order kinetic equation were fit models to describe the equilibrium adsorption and the kinetic behavior of MB on the adsorbents, respectively. The usability of the prepared samples was also studied for six cycles which showed the acceptable performance of the magnetic adsorbents for the real applications.

随后在磁性和非磁性胡桃基活性炭（AC）存在下，将一种新颖的核-壳钴和镍基金属有机骨架（MOF）纳米复合材料用于批料中的亚甲基蓝（MB）的吸附通过高效且简便的制备方法合成的系统。通过应用常规测试来表征纳米复合材料，包括XRD，FTIR，FESEM，EDX，TEM，VSM，TGA和BET。结果表明，分散良好的磁性纳米复合材料的纳米粒度小于20 nm。从TEM图像检测出磁性纳米复合材料的核-壳结构。分析结果还表明，磁性复合材料的热阻高于其他样品。计算得出，在非磁性和磁性AC上负载的钴基MOF的最大吸附容量分别为128和112.32 mg / g，这比镍基复合材料要高。Langmuir等温线和伪二级动力学方程是拟合模型，分别描述了MB在吸附剂上的平衡吸附和动力学行为。还对制备的样品的可用性进行了六个周期的研究，结果表明磁性吸附剂在实际应用中具有可接受的性能。Langmuir等温线和伪二级动力学方程是拟合模型，分别描述了MB在吸附剂上的平衡吸附和动力学行为。还对制备的样品的可用性进行了六个周期的研究，结果表明磁性吸附剂在实际应用中具有可接受的性能。Langmuir等温线和伪二级动力学方程是拟合模型，分别描述了MB在吸附剂上的平衡吸附和动力学行为。还对制备的样品的可用性进行了六个周期的研究，结果表明磁性吸附剂在实际应用中具有可接受的性能。