东南大学学报（英文版）2020，Vol.36Issue(3)：285-291,7.DOI:10.3969/j.issn.1003-7985.2020.03.006
离子相关性对表面电荷倒置在混合电解质溶液中的影响机理
Effects of ion-ion correlations on surface charge inversion in mixture electrolyte solutions
摘要
Abstract
As the structure of electrical double layer (EDL) is crucial for the transport properties of ions in micro/nanochannels,to demonstrate the effects of the ion-ion correlations on EDL structures in mixture electrolyte solutions,the interaction forces between two mica surfaces immersed in different volume fractions of LaC13/KC1 and LaC13/MgCl2 mixture solutions with a total ionic strength of 10-4 mol/L were measured using a surface forces apparatus (SFA).The results reveal that the surface charge of mica surfaces can be inversed at a critical concentration of La3+ ions in electrolyte solutions,due to the correlations between La3+ ions.The addition of monovalent has negligible effects on ion-ion correlations,while the charge inversion was slightly suppressed by introducing the divalent ions.The mechanism of charge inversion in mixture electrolyte solutions was analyzed based on the strongly correlated liquid (SCL) theory.These findings provide implications for understanding the effects of ion-ion correlations on EDL structures,surface charge properties,and ion transportation.关键词
离子相关性/电荷倒置/混合电解质溶液/表面力仪Key words
ion-ion correlations/charge inversion/mixture electrolyte solutions/surface forces apparatus分类
化学化工引用本文复制引用
谭启檐,阚亚鲸,赵古田,陈云飞..离子相关性对表面电荷倒置在混合电解质溶液中的影响机理[J].东南大学学报（英文版）,2020,36(3):285-291,7.基金项目
The National Natural Science Foundation of China (No.51605090),the Natural Science Foundation of Jiangsu Province (No.BK20160776,BK20160670),Research Foundation of Nanjing Institute of Technology (No.YKJ201502). （No.51605090）
