离子液体([C6MIm])从体相电迁移至水相研究

Electromigration of [C6MIm]from Ionic Liquids Bulk to Aqueous Solutions

中文关键词:  离子液体  电迁移  电极水溶液  回溶

英文关键词:Ionic liquids  Electromigration  Aqueous electrode solutions  Back-dissolution

中文摘要:

      离子在离子液体/水溶液二元系统中的电迁移行为在很多领域受到了越来越多的关注。本文通过研究不同条件下离子液体离子在电极液中的浓度变化,系统地研究了电极溶液酸—碱度,电极溶液中电解质浓度以及离子液体中溶解LiN(CF₃SO₂)₂与否对[C₆MIm]⁺离子电迁移的影响。总的来说,随着电流的增加,[C₆MIm]⁺离子向阴极水溶液的迁移量随之增加,向阳极水溶液的迁移量随之减少；然而N(CF₃SO₂)₂-离子向阳极水溶液的迁移量随之增加,向阴极水溶液的迁移量随之减少。当电极溶液为碱性,[C₆MIm]⁺离子的迁移量明显减少。在电极溶液中溶入LiN(CF₃SO₂)₂时或者将LiN(CF₃SO₂)₂溶入离子液体时,[C₆MIm]⁺离子的迁移量也明显受到抑制。

英文摘要:

      The ions electromigration of ionic liquids(ILs)/aqueous solution binary system have attracted increasingly attention in many fields.In this work,the effect of acidity-alkalinity,electrolyte concentration of electrode solutions and ILs with LiN(CF₃SO₂)₂ on the migration of[C₆MIm]⁺ ions was investigated systematically by studying the concentration change of ions of ILs in the electrode solutions.Generally,the concentration of[C₆MIm]⁺ ions increased in cathode solution and decreased in anode solution with increasing current,while the concentration of N(CF₃SO₂)-₂ ions increased in anode solution and decreased in cathode solution.When basic solution was used as electrode solution,the migration of[C₆MIm]⁺ ions was restrained markedly.LiN(CF₃SO₂)₂ solution was used as electrode solution and the dissolution of LiN(CF₃SO₂)₂ in ILs could reduce the migration of[C₆MIm]⁺ ions effectively