Polyaniline nanofiber composites with metal salts: Chemical sensors for hydrogen sulfide

Shabnam Virji*, Jesse D. Fowler, Christina O. Baker, Jiaxing Huang, Richard B. Kaner, Bruce H. Weiller

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

203 Scopus citations

Abstract

A bulk synthetic method that yields uniform polyaniline nanofibers with narrow size distribution, which can be adjusted from 30 to 120 mm, was analyzed. The polyaniline nanofibers used as chemical sensors offers high surface area and small diameter, which facilitates the diffusion of molecules and dopants into the nanofibers. In this experiment, as a result new composite materials were formed from metal salts and polyaniline nanofibers, which show an enhanced response to hydrogen sulfide. The reaction between H2S and metal occurs with metal ions coordinated to polyaniline whereas a metal salt is added to polyaniline the metal cation coordinates both the imine and amine nitrogen atoms on the polyaniline chains. The mechanism of H2S with the metal salt to form the corresponding metal sulfide is offered. These new materials have great potential to control the response of conducting polymers to various chemicals along with other new applications.

Original languageEnglish (US)
Pages (from-to)624-627
Number of pages4
JournalSmall
Volume1
Issue number6
DOIs
StatePublished - May 1 2005

Keywords

  • Metal salts
  • Nanofibers
  • Organic-inorganic hybrid composites
  • Polyaniline
  • Sensors

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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