Interactions between polyaniline and silver cations
- National Univ. of Singapore (Singapore)
Polyaniline (PAn) is one of the more illustrious conductive polymers with demonstrated successes in such diverse application areas as rechargeable batteries, electrochromic windows, electrocatalysis, anticorrosion coatings, and inorganic and biological sensors. Polyaniline (PAn) thin films were prepared from aniline solutions in H{sub 2}SO{sub 4} by scanning the potential cyclically between {minus}0.2 and 0.8 V (vs. SCE). Films of different thicknesses, and hence different intrinsic oxidation states, reacted differently with 0.1M AgNO{sub 3}. While redox reactions leading to the deposition of silver metal occurred between Ag{sup +} and PAn in thick films ({>=} 40 deposition cycles), thin films ({<=} 20 deposition cycles) favored the formation of a metal cation-polymer complex. The valency of silver in the polymer was determined by electrochemical measurements and X-ray photoelectron spectroscopy. Changes in polymer morphology due to the AgNO{sub 3} treatment were examined by scanning electron microscopy. It is suggested that the interactions between PAn and Ag{sup +} could be applied to electrocatalysis and to the recovery of silver from aqueous solutions.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 64791
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 142; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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