摘要
构建了一种电势稳定性好的全固态钙离子选择电极(Ca^2+-ISE),采用碳纳米管(CNT)/Ag/MoS2为转导层,自制的三脚架化合物作为钙离子载体,制备固体接触式Ca^2+-ISE。系统分析了全固态Ca^2+-ISE的稳定性、能斯特斜率、响应范围、选择性系数等主要性能,发现制备的固体接触式Ca^2+-ISE在钙离子浓度为1×10^-6~1×10^-1mol/L范围内呈现线性能斯特响应,响应斜率为28.1mV/decade。CNT/Ag/MoS2的引入有利于提高固体接触式Ca^2+-ISE的离子浓度线性响应范围,缩短电势平衡时间,降低测试能斯特斜率与理论值差,对于Ca^2+-ISE的长期在线检测有重要研究意义。
An all-solid-state Ca^2+ion selective electrode(Ca^2+-ISE)was prepared with carbon nanotube(CNT)/Ag/MoS 2 as the ion-to-electron transducer and tripodal compound as the calcium ionophore.The stability,slope,response range,selectivity coefficient,etc.of the electrode were investigated.It is revealed that the electrode exhibits a 28.1 mV/decade Nernst slope in the range of 1×10-6~1×10-1 mol/L Ca^2+concentration.The transducer is helpful in enlarging the linear response range of the Ca^2+concentration,shortening the potential balance time and reducing the difference of the Nernst slope.All of these results are important for long-term online detection of calcium ions for the solid electrode.
作者
罗云凤
刘保双
李春香
LUO Yunfeng;LIU Baoshuang;LI Chunxiang(Drilling Technology Research Institute,Shengli Petroleum Engineering Co.,Ltd.,SINOPEC,Dongying,Shandong 257000,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China)
出处
《应用化学》
CAS
CSCD
北大核心
2019年第6期704-710,共7页
Chinese Journal of Applied Chemistry
基金
国家科技重大专项(2016ZX05022-006)
哈尔滨市应用技术研究与开发项目(2017RAYXJ015)项目资助~~
关键词
全固态电极
钙离子选择性电极
离子-电子转导层
all-solid-state electrode
calcium ion selectiveelectrode
ion-to-electron transducer
