Research Progress on Adsorption of Metal-organic Framework Based Materials for Heavy Metal Ions
Metal-organic frameworks(MOFs),a kind of novel porous materials,have drawn significant attentions in research of water treatment field due to their characteristics such as high specific surface area,adjustable pore size and structure,facile surface modification and functiona-lization and so on.In recent years,many researchers have designed and synthesized a variety of MOFs materials and investigated their adsorp-tion performance and adsorption mechanism for heavy metal ions in aqueous solution.In order to further improve the adsorption capacity,struc-tural stability and adsorption selectivity,researchers have also developed various MOFs-based materials by introducing different functional groups or unsaturated metal sites into the MOFs to obtain modified MOFs materials,combining with other materials to construct MOFs composites,and post-processing the MOFs to prepare MOFs-derived carbon materials.This paper reviews the construction methods of MOFs materials,modified MOFs materials,MOFs composites and MOFs-derived carbon materials reported in recent years,expounds the adsorption performance for heavy metal ions in aqueous solution and the adsorption mechanisms,analyzes the current problems of the MOFs-based materials in the practical appli-cation,and prospects the key research directions in the future.
metal-organic framework materialsconstruction methodsadsorption performanceadsorption mechanismheavy metal ions
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