Graphene oxide/carbon nanotube composite hydrogels - Versatile materials for microbial fuel cell applications

G. Gnana Kumar*, Saud Hashmi, Chandrasekaran Karthikeyan, Amin GhavamiNejad, Mohammad Vatankhah-Varnoosfaderani, Florian J. Stadler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

Carbonaceous nanocomposite hydrogels are prepared with an aid of a suspension polymerization method and are used as anodes in microbial fuel cells (MFCs). (Poly N-Isopropylacrylamide) (PNIPAM) hydrogels filled with electrically conductive carbonaceous nanomaterials exhibit significantly higher MFC efficiencies than the unfilled hydrogel. The observed morphological images clearly show the homogeneous dispersion of carbon nanotubes (CNTs) and graphene oxide (GO) in the PNIPAM matrix. The complex formation of CNTs and GO with NIPAM is evidenced from the structural characterizations. The effectual MFC performances are influenced by combining the materials of interest (GO and CNTs) and are attributed to the high surface area, number of active sites, and improved electron-transfer processes. The obtained higher MFC efficiencies associated with an excellent durability of the prepared hydrogels open up new possibilities for MFC anode applications. Hydrogels with carbonaceous fillers are synthesized and used as anode for microbial fuel cells (MFCs). While carbon nanotubes and graphene oxide alone improve electrical properties and MFC efficiency, only the hydrogel incorporating both fillers shows optimized properties, allowing for improved MFCs.

Original languageEnglish (US)
Pages (from-to)1861-1865
Number of pages5
JournalMacromolecular Rapid Communications
Volume35
Issue number21
DOIs
StatePublished - Nov 1 2014

Keywords

  • carbon nanotubes
  • composite hydrogels
  • graphene oxide
  • microbial fuel cells

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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