(NH4)2S2O8/AC电极制备及其电吸附性能
Preparation and electrosorption performance of(NH4)2S2O8/AC electrode
裴盼盼 1李海红 2吴沁如2
作者信息
- 1. 陕西省现代建筑设计研究院,陕西西安 710021
- 2. 西安工程大学环境与化学工程学院,陕西西安 710048
- 折叠
摘要
为了制备电化学性能更优的活性炭电极,利用(NH4)2S2O8浸渍得到改性后的APS-AC,运用EST技术筛选石墨烯微片、导电炭黑、碳纳米管中更佳的导电剂,制备电化学性能更优的APS-AC电极;通过CV、EIS、GCD和CA等测试手段比较APS-AC电化学性能,并结合吸附行动力学分析电吸附性能和吸附规律.结果表明:导电炭黑制备的APS-AC电极性能更佳,比电容为275.208 F/g;表征发现APS-AC电极的接触角变小,亲水性提高;充放电周期大,充放电性能和电荷储存能力更好.溶液中不同阴阳离子的吸附效果不同,离子去除率为K+＞Na+、Cl-＞SO42-,吸附过程更符合准二级吸附动力学.
Abstract
In order to prepare activated carbon electrodes with better electrochemical performance,modified activated carbon(APS-AC)was obtained by impregnation with(NH4)2S2O8.The better conductive agents in graphene microsheets,conductive carbon black,and carbon nanotubes were screened through EST tech-nology to prepare APS-AC electrodes with better electrochemical performance.We compared the electro-chemical performance of APS-AC through testing methods such as CV,EIS,GCD,and CA,and analyzed the electro adsorption performance and adsorption law in combination with adsorption kinetics.The results showed that the APS-AC electrode prepared with conductive carbon black had better performance,with a specific capacitance of 275.208 F/g.Through characterization,it was found that the contact angle of the APS-AC electrode decreased and the hydrophilicity improved.A longer charging and discharging cycle re-sults in better charging and discharging performance and charge storage capacity.The adsorption efficiency of different anions and cations in the solution varies,with ion removal rates being K+＞Na and Cl-＞SO4-.The adsorption process is more in line with quasi second order adsorption kinetics.
关键词
活性炭/活性炭改性/电极制备/吸附动力学/电吸附性能Key words
activated carbon/activated carbon modification/electrode preparation/adsorption ki-netics/electrosorption properties引用本文复制引用
基金项目
陕西省科技厅社会发展项目(2020SF-435)
榆林市科技计划(CXY-2020-054)
出版年
2024
国家科技期刊平台
NSTL
万方数据