碳基溴离子选择渗透膜的构筑及其对溴的分离
Construction of carbon-based bromide ion permselective membrane and its separation property for bromide
王洁 1张良 1罗善霞 2杜晓 1郝晓刚1
作者信息
- 1. 太原理工大学化学工程与技术学院,太原 030024
- 2. 河北省区域地质调查院,廊坊 065000;中国地质调查局廊坊自然资源综合调查中心,廊坊 065000
- 折叠
摘要
以碳纳米管(CNTs)作为电子传递载体、溴氧铋(BiOBr)作为溴离子(Br-)传输通道、季铵化壳聚糖(QCS)作为成膜剂,通过真空抽滤法制备了碳基溴离子选择渗透膜(CNTs/QCS/BiOBr),并将其应用于电控离子选择渗透膜分离(ESIP)系统中分离回收Br-,探讨了 ESIP体系中的操作参数对Br-渗透通量的影响,研究了 CNTs/QCS/BiOBr膜在ESIP系统中的稳定性及其对Br-的选择性分离效果.结果表明,当ESIP系统的槽电压和脉冲电压分别为3.5 V和0/-2.5 V时,CNTs/QCS/BiOBr膜对Br的渗透通量达到了 3.00g/(m2·h).此外,CNTs/QCS/BiOBr复合膜在ESIP系统中不仅具有循环稳定性,还能实现Br-的选择性分离.
Abstract
The carbon-based Br-permselective membrane(CNTs/QCS/BiOBr)was constructed by vacuum filtration using carbon nanotubes(CNTs)as the transfer carrier for electrons,bismuth oxybromide(BiOBr)as the transport channels for Br-and quaternized chitosan(QCS)as the membrane forming agent.Subsequently,the CNTs/QCS/BiOBr membrane was assembled in the electrochemically switched ion permselective(ESIP)system for the separation of Br-and the influence of different operating parameters on the separation effect of Br-was investigated.The stability of CNTs/QCS/BiOBr membrane in the ESIP system and their selective separation effect on Br-were researched.The results indicate that the flux of CNTs/QCS/BiOBr composite membrane for Br reaches 3.00 g/(m2·h)when the cell and pulse voltages in the ESIP system are 3.5 V and 0/-2.5 V,respectively.In addition,the CNTs/QCS/BiOBr composite membrane possesses cycling stability and selectivity for Br-.
关键词
溴离子/电控离子选择渗透/分离回收/碳纳米管/碳基膜Key words
bromine ion/electrochemically switched ion permselective/separation and recovery/carbon nanotubes/carbon-based membrane引用本文复制引用
基金项目
国家自然科学基金(U21A20303)
国家自然科学基金(22078217)
河北省地质矿产勘查开发局科研项目(13000022P00329410110T)
出版年
2024
NETL
NSTL
维普
万方数据