Investigation of Curcumin Absorption by Aqueous Solution using Magnetic Metal-organic Framework Nanocomposite NiFe 2 O 4 @SiO 2 @HKUST-1
AbstractIn this study, magnetic metal-organic framework nanocomposite NiFe 2 O 4 @SiO 2 @HKUST-1 with nickel ferrite weight ratios to silica substrate (30, 10 and 50) were synthesized by an in-situ self-assembled method which is one of the green synthesis methods. Synthesized samples were characterized and its interaction with curcumin were investigated. Phase formation, type of bonds formed, appearance and size of crystals, magnetic property and size of the specific surface area analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and BET surface area respectively. Finally, the adsorption and interaction of curcumin and effective parameters such as drug and adsorbent dose on adsorption rates were investigated. Results showed the highest absorption capacity of curcumin were obtained for magnetic metal-organic framework nanocomposite (30% by weight) at pH=7, ambient temperature, contact time of 8 hours and with the weight ratio (2:1) of curcumin to synthesized magnetic metal-organic framework nanocomposite. Experimental data were better matched with Frondelich's adsorption isotherm. Although synthetic studies have shown that the process of adsorption and interaction of curcumin with a synthesized magnetic metal-organic framework nanocomposite, follows the quasi-second-order model.