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Keywords:

  • FT-IR;
  • Electrospun nanofibers;
  • morphology

Abstract

Polyacrylonitrile (PAN) nanofibers (prepared by an electrospinning technique) were chemically modified with hydrazine. The Fourier transform infrared spectrum of the hydrazine-modified polyacrylonitrile (HM–PAN) showed that the intensity of the nitrile peak (2250 cm−1) of the PAN nanofibers decreased significantly after treatment with hydrazine. New peaks at about 3400–3100 cm−1 (N[BOND]H stretching vibration) also appeared, which showed that the hydrazine was chemically attached to the PAN nanofibers. HM–PAN had a smooth surface (as confirmed by a scanning electron microscopy) and was a suitable material for the adsorption of metal ions from aqueous solutions. The adsorption capacity of HM–PAN increased as the adsorption time increased and became constant at 114 and 217 mg/g for Cu(II) and Pb(II) ions, respectively, after 24 h. In addition, more than 90% of the adsorbed Cu(II) and Pb(II) ions were recovered in a 1M HNO3 solution after 1 h. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011