The correlation between the anions of the ionic liquids of BMIM+BF4-, BMIM+CF3SO3- and BMIM+NO3- in poly(2-ethyl-2-oxazoline)/AgNO3 membranes and reduction of silver ions has been investigated. The anion type negligibly affected the initial separation performances, however it significantly affected the long-term operation stability. Additionally, UV and TEM confirmed the long-term operational stability was strongly associated with the reduction rate of the silver ions. The reduction rate of the silver ions in the polymer/silver salt/ionic liquid complex was observed in following order: BMIM+BF4- > BMIM+CF3SO3- > BMIM+NO3-, suggesting that among the ionic liquids investigated, BMIM+NO3- had the most improved separation performance.
Bibliographical noteFunding Information:
This work was supported by Energy Technology R&D program (2006-E-ID11-P-13) under the Korea Ministry of Commerce, Industry and Energy (MOCIE). KC acknowledges the financial support of NSI-NCRC and the Ministry of Education through the Brain Korea 21 Program at Seoul National University.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Science(all)
- Water Science and Technology
- Mechanical Engineering