Continuous operation of membrane capacitive deionization cells assembled with dissimilar potential of zero charge electrode pairs

Ayokunle Omosebi, Xin Gao, Jeffery Rentschler, James Landon, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

The performance of single stack membrane assisted capacitive deionization cells configured with pristine and nitric acid oxidized Zorflex (ZX) electrode pairs was evaluated. The potentials of zero charge for the pristine and oxidized electrodes were respectively -0.2. V and 0.2. V vs. SCE. Four cell combinations of the electrodes including a pristine anode-pristine cathode, oxidized anode-pristine cathode, pristine anode-oxidized cathode, and oxidized anode-oxidized cathode were investigated. When the PZC was located within the polarization window of the electrode, diminished performance was observed. The cells were operated at 1.2. V and based on potential distribution results, the effective working potentials were ~0.9, 0.8, 1.2, and 1.1. V for the pristine anode-pristine cathode, oxidized anode-pristine cathode, pristine anode-oxidized cathode, and oxidized anode-oxidized cathode cells, respectively. The highest electrosorption capacity of 17. mg NaCl/g ZX was observed for the pristine anode-oxidized cathode cell, where both PZCs were outside of the polarization window.

Original languageEnglish
Pages (from-to)344-350
Number of pages7
JournalJournal of Colloid and Interface Science
Volume446
DOIs
StatePublished - May 5 2015

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Inc.

Keywords

  • Deionization
  • Ion-exchange membranes
  • Membrane capacitive deionization
  • Potential of zero charge
  • Water desalination

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Fingerprint

Dive into the research topics of 'Continuous operation of membrane capacitive deionization cells assembled with dissimilar potential of zero charge electrode pairs'. Together they form a unique fingerprint.

Cite this