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Qin Zhang,Lijiao Fan,Wenbin Liu,Yuming Xie,Jiangang Li,Guolin Huang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
The core–shell structure UiO-66-NH2@Ni-MOF was prepared by in-diffusion growth of 2D Ni-MOF onUiO-66-NH2 using PVP (polyvinylpyrrolidone) as a structural guide. It was applied to the adsorption ofU(VI) in aqueous solution. The materials were characterized by powder X-ray diffraction (PXRD),Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electronmicroscopy (TEM), and energy dispersive spectrometer (EDS). The UiO-66-NH2@Ni-MOF adsorptionto U(VI) was investigated experimentally. The study showed that the adsorption of U(VI) onto UiO-66-NH2@Ni-MOF was endothermic and spontaneous. At pH 5.00 and 308 K, the adsorption capacity was581.40 mg/g according to Langmuir model. In addition, the adsorption process can be described by thepseudo-second-order kinetic model. The adsorption capacity was kept at 83.83% of its original one afterfive sorption–desorption cycles, a promising indication for repetitive usage.