5. Conclusion
In this study, NiFe2O4@SiO2@HKUST-1 adsorbent was prepared by in in-situ self-assembly method, which is one of the green synthesis methods, NiFe2O4@SiO2@HKUST-1 core-shell magnetic microspheres were characterized. NiFe2O4@SiO2@HKUST-1 application in methylene blue pollutant adsorption and influence of time and pH factors were investigated. As a result, at the more acidic pHs, the lower the concentration of the dye solution, the less the dye molecule in the solution so pore volumes and surface areas will be filled in a longer time and their removal efficiency will be higher. As an optimum condition, within 60 minutes approximately 98% of dye removal was observed. For this reason, the magnetic metal-organic framework nanocomposite 30% NiFe2O4@SiO2@HKUST-1 was used as an optimum percentage which means that the adsorption process was mostly multilayered on heterogeneous surfaces of the metal-organic framework nanocomposites.