Graphene-polypyrrole nanocomposite as a highly efficient and low cost electrically switched ion exchanger for removing ClO4- from wastewater

Sheng Zhang, Yuyan Shao, Jun Liu, Ilhan A. Aksay, Yuehe Lin

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

Perchlorate (ClO4-) contamination is a widespread concern affecting water utilities. In the present study, functionalized graphene sheets were employed as the scaffold to synthesize a novel graphene-polypyrrole (Ppy) nanocomposite, which served as an excellent electrically switched ion exchanger for perchlorate removal. Scanning electron microscopy and electrochemical measurements showed that the 3D nanostructured graphene-Ppy nanocomposite exhibited a significantly improved uptake capacity for ClO 4- compared with Ppy film alone. X-ray photoelectron spectroscopy confirmed the uptake and release process of ClO4 - in graphene-Ppy nanocomposite. In addition, the presence of graphene substrate resulted in high stability of graphene-Ppy nanocomposite during potential cycling. The present work provides a promising method for large scale water treatment.

Original languageEnglish (US)
Pages (from-to)3633-3637
Number of pages5
JournalACS Applied Materials and Interfaces
Volume3
Issue number9
DOIs
StatePublished - Sep 28 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • graphene
  • ion exchange
  • perchlorate
  • polypyrrole
  • uptake capacity
  • water treatment

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