摘要：为了提高金属有机骨架多孔材料MIL-101对水体中碘离子的吸附性能,通过水热合成法制得Ag掺杂改性MIL-101材料,利用扫描电子显微镜、X射线衍射、比表面积及孔径分析、激光衍射粒度分析等技术手段对材料进行表征,并考察多种参数对吸附效果的影响。结果表明:纳米Ag主要存在于基体材料MIL-101的晶格中,对材料的晶体结构无显著破坏;N,N-二甲基甲酰胺(DMF)加乙醇的后处理方法能有效提高材料的吸附性能;改性后的材料表现出快速、高效的吸附性能;在痕量碘离子环境下,Ag掺杂质量分数为2%的改性MIL-101的饱和吸附量可达23 mg/g,吸附效率达到93%以上;在高浓度环境下,样品吸附效率随着Ag掺杂量的增加而提高。

关键词：金属有机骨架 MIL-101 材料；银掺杂改性；碘离子；吸附性能

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