Abstract：To improve the adsorption performance of metal-organic frameworks porous materials MIL-101 for iodide ions in solutions, Ag doped modified MIL-101 materials were prepared by the hydrothermal method. The materials were characterized by the technical means of SEM,XRD, specific surface and pore size analysis, laser diffraction particle size analysis. The effect of several parameters on adsorption performance was investigated. The results show that Ag nano-particles are identified to be confined in the cages of matrix materials MIL-101, and have no significant damage to the crystal structure of materials. The adsorption performance of materials is effectively improved by the post-processing of DMF and ethanol. When the iodine ion concentration is in a trace amount,the adsorbent of modified MIL-101 materials with doped Ag mass fraction of 2% exhibits a capacity of 23 mg/g and an adsorption rate of 93%. The adsorption efficiency of materials at a high iodide ion level increases with the increase doping amount of Ag.

Keywords: metal-oganic frameworks MIL-101 materials; Ag doping; iodide ion; adsorption performance